673AB7 (Deep Purple 500) — RGB, HSL, CMYK and Contrast

Q: What text colour should sit on 673AB7?

Black gives 2.87:1 and white gives 7.33:1, so white wins at 7.33:1. That clears the 4.5:1 AA threshold for normal text and the 7:1 AAA threshold as well.

Every value recomputed from the hex code · WCAG 2.1 contrast ratios

A purple at 47% lightness and 52% saturation, which puts it at 7.33:1 against white and 2.87:1 against black. The tables below give the notation conversions, the tints and shades that keep the hue intact, and the harmonies that pair with it.

673AB7

Notation conversions

Notation	Value
HEX	`673AB7`
RGB	rgb(103, 58, 183)
HSL	hsl(262, 52%, 47%)
CMYK	cmyk(44%, 68%, 0%, 28%)
Relative luminance	0.0933
Perceived brightness	33.6 / 100

R=103 G=58 B=183 · hue 261.6° · saturation 51.9% · lightness 47.3%

Contrast against pure white and pure black

Pair this colour with the two extremes to see which is the safer text partner. AA needs 4.5:1 for body text and 3:1 for large text; AAA raises that to 7:1 and 4.5:1.

Against	Hex	Ratio	AA text	AA large	AAA text
#FFFFFF	`white`	7.33:1	pass	pass	pass
#000000	`black`	2.87:1	fail	fail	fail

Tints and shades

Lightness moves in ten-point steps while hue and saturation stay fixed, which keeps the colour recognisable in a scale. The last column is the ratio against white text, useful for deciding where a scale stops working as a background.

Step	Hex	HSL	vs white text
shade -30	`#261543`	hsl(262, 52%, 17%)	16.53:1
shade -20	`#3b216a`	hsl(262, 52%, 27%)	13.03:1
shade -10	`#512e90`	hsl(262, 52%, 37%)	9.80:1
tint +10	`#8259cb`	hsl(262, 52%, 57%)	4.95:1
tint +20	`#9f80d7`	hsl(262, 52%, 67%)	3.21:1
tint +30	`#bda7e3`	hsl(262, 52%, 77%)	2.14:1

Harmonies

Scheme	Hex
Complementary	`#8ab73a`
Analogous −30	`#3a4bb7`
Analogous +30	`#a63ab7`
Triadic −120	`#3ab767`
Triadic +120	`#b7673a`

Take the channels apart and the numbers hold together: 103, 58 and 183 average 115, the strongest channel is 183 and the weakest 58, and that span is what pushes saturation to 51.9% at hue 261.6° and lightness 47.3%. Luminance 0.0933 with perceived brightness 33.6 out of 100 is why the white ratio (7.33:1) and the black ratio (2.87:1) diverge by 4.46. Entry 46 of 69, it steps to #261543 at minus thirty and #bda7e3 at plus thirty.

Nearby colours

4169E1 royalblue 4B0082 indigo 663399 rebeccapurple 9370DB mediumpurple 800080 purple 9C27B0 Purple 500

Frequently asked questions

What text colour should sit on 673AB7?
Black gives 2.87:1 and white gives 7.33:1, so white wins at 7.33:1. That clears the 4.5:1 AA threshold for normal text and the 7:1 AAA threshold as well.

Do the CMYK numbers match a print workflow?
They are the naive conversion from RGB, which assumes no ink limit, no colour profile and no black generation strategy. Real print work needs a profile-aware conversion; the values here are the ones the converter reports and are best used as a starting point for a designer rather than a press-ready separations file.

Convert any other colour, or test a pair against each other, in the ColrShift colour converter and contrast checker. The colour library groups every entry on this site by hue family.