#4571B3

Closest named color: French Blue (#436BAD). oklch(54.8% 0.115 258.3), rgb(69, 113, 179).

White text reads best on this color (4.92:1).

About this color

#4571B3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.115 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.018 away. White text reads best on it, at 4.92:1.

Hue family	Blues
Lightness	medium-dark (55%)
Chroma	moderately saturated (0.115)
Temperature	cool
Nearest name	French Blue (#436BAD)
Black text	4.26:1
White text	4.92:1

Values

HEX	#4571B3
RGB	rgb(69, 113, 179)
HSL	hsl(216, 44%, 49%)
OKLCH	oklch(54.8% 0.115 258.3)

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 #4571B3	4.92:1	AA	Lc -79.3	Fine for body text
Black text on #4571B3	4.26:1	AA large text	Lc 30.2	Non-text elements, placeholder text
#4571B3 text on white	4.92:1	AA	Lc 73.9	Content text, not long reading
#4571B3 text on black	4.26:1	AA large text	Lc -27.8	Dividers and decoration only

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

#F3F6FA

oklch(97.2% 0.006 255.5)
Step 100
100

#E4EAF4

oklch(93.5% 0.015 260.7)
Step 200
200

#CEDAED

oklch(88.5% 0.029 259.6)
Step 300
300

#ADC2E2

oklch(80.9% 0.051 258.7)
Step 400
400

#81A2D4

oklch(70.7% 0.082 258.5)
Step 500
500

#618AC9

oklch(63% 0.106 258.7)
Step 600
600 (this color)

#4571B3

oklch(54.8% 0.115 258.3)
Step 700
700

#39619C

oklch(49.2% 0.105 258)
Step 800
800

#2F4F7F

oklch(42.7% 0.089 258.3)
Step 900
900

#2A4266

oklch(37.7% 0.069 258.3)
Step 950
950

#19273C

oklch(27.1% 0.044 258.3)

Export this scale for Tailwind in the Tailwind colors tool

#4571B3 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)	#5576B6	0.024
Deuteranopia (no green cones)	#466CB2	0.014
Tritanopia (no blue cones)	#008089	0.098
Achromatopsia (no color)	#707070	0.115