#347DA0

Closest named color: Cerulean (#457B9D). oklch(55.9% 0.09 232.4), rgb(52, 125, 160).

Black text reads best on this color (4.58:1).

About this color

#347DA0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.090 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.014 away. Black text reads best on it, at 4.58:1.

Hue family	Blues
Lightness	medium-dark (56%)
Chroma	moderately saturated (0.090)
Temperature	cool
Nearest name	Cerulean (#457B9D)
Black text	4.58:1
White text	4.57:1

Values

HEX	#347DA0
RGB	rgb(52, 125, 160)
HSL	hsl(199, 51%, 42%)
OKLCH	oklch(55.9% 0.09 232.4)

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 #347DA0	4.57:1	AA	Lc -77.0	Fine for body text
Black text on #347DA0	4.58:1	AA	Lc 32.5	Non-text elements, placeholder text
#347DA0 text on white	4.57:1	AA	Lc 71.6	Content text, not long reading
#347DA0 text on black	4.58:1	AA	Lc -30.1	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

#F2F6F8

oklch(97.1% 0.005 228.8)
Step 100
100

#E3EBF0

oklch(93.5% 0.011 234.8)
Step 200
200

#CBDCE6

oklch(88.5% 0.023 233.4)
Step 300
300

#A8C6D7

oklch(81% 0.04 232.8)
Step 400
400

#77A8C2

oklch(70.6% 0.065 232)
Step 500
500

#5292B3

oklch(63% 0.082 232.6)
Step 600
600 (this color)

#347DA0

oklch(55.9% 0.09 232.4)
Step 700
700

#256888

oklch(49% 0.084 233)
Step 800
800

#21556E

oklch(42.6% 0.069 232.5)
Step 900
900

#214659

oklch(37.6% 0.053 233)
Step 950
950

#142934

oklch(26.9% 0.034 232.8)

Export this scale for Tailwind in the Tailwind colors tool

#347DA0 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)	#6C7CA2	0.060
Deuteranopia (no green cones)	#5D719F	0.050
Tritanopia (no blue cones)	#008689	0.056
Achromatopsia (no color)	#757575	0.090