#457DBC

Closest named color: Windows Blue (#3778BF). oklch(58% 0.114 252.8), rgb(69, 125, 188).

Black text reads best on this color (4.91:1).

About this color

#457DBC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.114 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.021 away. Black text reads best on it, at 4.91:1.

Hue family	Blues
Lightness	medium-dark (58%)
Chroma	moderately saturated (0.114)
Temperature	cool
Nearest name	Windows Blue (#3778BF)
Black text	4.91:1
White text	4.27:1

Values

HEX	#457DBC
RGB	rgb(69, 125, 188)
HSL	hsl(212, 47%, 50%)
OKLCH	oklch(58% 0.114 252.8)

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 #457DBC	4.27:1	AA large text	Lc -74.8	Content text, not long reading
Black text on #457DBC	4.91:1	AA	Lc 34.7	Non-text elements, placeholder text
#457DBC text on white	4.27:1	AA large text	Lc 69.3	Content text, not long reading
#457DBC text on black	4.91:1	AA	Lc -32.3	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

#F2F6FA

oklch(97.1% 0.007 247.9)
Step 100
100

#E3EBF4

oklch(93.7% 0.015 251.2)
Step 200
200

#CCDBEC

oklch(88.5% 0.029 251.5)
Step 300
300

#AAC3E2

oklch(80.9% 0.052 253.9)
Step 400
400

#7CA4D3

oklch(70.7% 0.082 252.9)
Step 500
500

#598DC7

oklch(63.2% 0.104 252.2)
Step 600
600 (this color)

#457DBC

oklch(58% 0.114 252.8)
Step 700
700

#30639B

oklch(49.2% 0.106 252.6)
Step 800
800

#28517E

oklch(42.8% 0.088 252.5)
Step 900
900

#254365

oklch(37.6% 0.069 252.8)
Step 950
950

#16273B

oklch(26.8% 0.044 253.3)

Export this scale for Tailwind in the Tailwind colors tool

#457DBC 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)	#6281BF	0.035
Deuteranopia (no green cones)	#5275BB	0.024
Tritanopia (no blue cones)	#008C94	0.093
Achromatopsia (no color)	#7A7A7A	0.114