#677EAB

Closest named color: Off Blue (#5684AE). oklch(59.3% 0.074 263.4), rgb(103, 126, 171).

Black text reads best on this color (5.14:1).

About this color

#677EAB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.074 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.024 away. Black text reads best on it, at 5.14:1.

Hue family	Blues
Lightness	medium-dark (59%)
Chroma	moderately saturated (0.074)
Temperature	cool
Nearest name	Off Blue (#5684AE)
Black text	5.14:1
White text	4.07:1

Values

HEX	#677EAB
RGB	rgb(103, 126, 171)
HSL	hsl(220, 29%, 54%)
OKLCH	oklch(59.3% 0.074 263.4)

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 #677EAB	4.07:1	AA large text	Lc -73.4	Content text, not long reading
Black text on #677EAB	5.14:1	AA	Lc 36.2	Non-text elements, placeholder text
#677EAB text on white	4.07:1	AA large text	Lc 67.9	Content text, not long reading
#677EAB text on black	5.14:1	AA	Lc -33.7	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 600.

Step 50
50

#F4F5F8

oklch(97% 0.004 271.4)
Step 100
100

#E6EAF1

oklch(93.6% 0.01 261.8)
Step 200
200

#D3D9E6

oklch(88.5% 0.019 266)
Step 300
300

#B5C1D7

oklch(80.9% 0.034 262.7)
Step 400
400

#8FA1C3

oklch(70.7% 0.054 263.1)
Step 500
500

#748AB4

oklch(63.2% 0.069 263.1)
Step 600
600 (this color)

#677EAB

oklch(59.3% 0.074 263.4)
Step 700
700

#4C6088

oklch(49% 0.069 263.6)
Step 800
800

#3F4F6F

oklch(42.8% 0.057 263.7)
Step 900
900

#35425A

oklch(37.8% 0.045 262.4)
Step 950
950

#1F2634

oklch(26.8% 0.028 263.9)

Export this scale for Tailwind in the Tailwind colors tool

#677EAB 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)	#6E81AD	0.013
Deuteranopia (no green cones)	#677BAA	0.008
Tritanopia (no blue cones)	#51878E	0.065
Achromatopsia (no color)	#7E7E7E	0.074