#687BB5

Closest named color: Off Blue (#5684AE). oklch(59.2% 0.092 269.6), rgb(104, 123, 181).

Black text reads best on this color (5.08:1).

About this color

#687BB5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.092 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.036 away. Black text reads best on it, at 5.08:1.

Hue family	Blues
Lightness	medium-dark (59%)
Chroma	moderately saturated (0.092)
Temperature	cool
Nearest name	Off Blue (#5684AE)
Black text	5.08:1
White text	4.12:1

Values

HEX	#687BB5
RGB	rgb(104, 123, 181)
HSL	hsl(225, 34%, 56%)
OKLCH	oklch(59.2% 0.092 269.6)

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 #687BB5	4.12:1	AA large text	Lc -73.8	Content text, not long reading
Black text on #687BB5	5.08:1	AA	Lc 35.8	Non-text elements, placeholder text
#687BB5 text on white	4.12:1	AA large text	Lc 68.3	Content text, not long reading
#687BB5 text on black	5.08:1	AA	Lc -33.4	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

#F4F5F9

oklch(97.1% 0.005 275)
Step 100
100

#E6EAF2

oklch(93.6% 0.012 264.5)
Step 200
200

#D3D9E9

oklch(88.6% 0.023 269.4)
Step 300
300

#B6C0DC

oklch(80.9% 0.041 269.9)
Step 400
400

#909FCB

oklch(70.7% 0.067 270)
Step 500
500

#7587BD

oklch(63.1% 0.084 269.7)
Step 600
600 (this color)

#687BB5

oklch(59.2% 0.092 269.6)
Step 700
700

#4D5E91

oklch(49.1% 0.085 269.1)
Step 800
800

#3F4D76

oklch(42.7% 0.071 268.9)
Step 900
900

#36405F

oklch(37.7% 0.055 269.9)
Step 950
950

#202638

oklch(27.1% 0.035 269.8)

Export this scale for Tailwind in the Tailwind colors tool

#687BB5 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)	#6780B7	0.013
Deuteranopia (no green cones)	#607AB4	0.011
Tritanopia (no blue cones)	#4E8790	0.082
Achromatopsia (no color)	#7D7D7D	0.092