#587BCE

Closest named color: Windows Blue (#3778BF). oklch(59.6% 0.133 265.3), rgb(88, 123, 206).

Black text reads best on this color (5.13:1).

About this color

#587BCE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.133 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.042 away. Black text reads best on it, at 5.13:1.

Hue family	Blues
Lightness	medium-dark (60%)
Chroma	moderately saturated (0.133)
Temperature	cool
Nearest name	Windows Blue (#3778BF)
Black text	5.13:1
White text	4.08:1

Values

HEX	#587BCE
RGB	rgb(88, 123, 206)
HSL	hsl(222, 55%, 58%)
OKLCH	oklch(59.6% 0.133 265.3)

Contrast

WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.

Pair	WCAG 2	Result	APCA	APCA guidance
White text on #587BCE	4.08:1	AA large text	Lc -73.4	Content text, not long reading
Black text on #587BCE	5.13:1	AA	Lc 36.2	Non-text elements, placeholder text
#587BCE text on white	4.08:1	AA large text	Lc 67.9	Content text, not long reading
#587BCE text on black	5.13:1	AA	Lc -33.8	Non-text elements, placeholder text

Tints and shades

A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.

Step 50
50

#F3F5FC

oklch(97.1% 0.01 273.4)
Step 100
100

#E4EAF7

oklch(93.6% 0.019 266)
Step 200
200

#CED9F2

oklch(88.5% 0.036 266.7)
Step 300
300

#ACC1EC

oklch(81% 0.065 264.5)
Step 400
400

#819FE2

oklch(70.7% 0.104 265.4)
Step 500
500 (this color)

#587BCE

oklch(59.6% 0.133 265.3)
Step 600
600

#496EC7

oklch(55.6% 0.144 265.1)
Step 700
700

#3B5BAC

oklch(49% 0.135 265.5)
Step 800
800

#314B8C

oklch(42.7% 0.112 265.5)
Step 900
900

#2B3F6F

oklch(37.6% 0.086 265.4)
Step 950
950

#192541

oklch(26.9% 0.055 265.3)

Export this scale for Tailwind in the Tailwind colors tool

#587BCE with color blindness

Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.

Vision	Seen as	Shift (ΔE)
Protanopia (no red cones)	#5883D1	0.021
Deuteranopia (no green cones)	#4879CC	0.019
Tritanopia (no blue cones)	#008D9A	0.119
Achromatopsia (no color)	#7E7E7E	0.133