#457BB8
Closest named color: Windows Blue (#3778BF). oklch(57.4% 0.111 252.8), rgb(69, 123, 184).
Aa
Black text reads best on this color (4.77:1).
About this color
#457BB8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.111 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.020 away. Black text reads best on it, at 4.77:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.77:1 |
| White text | 4.39:1 |
Values
| HEX | #457BB8 |
| RGB | rgb(69, 123, 184) |
| HSL | hsl(212, 45%, 50%) |
| OKLCH | oklch(57.4% 0.111 252.8) |
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 #457BB8 | 4.39:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #457BB8 | 4.77:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #457BB8 text on white | 4.39:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #457BB8 text on black | 4.77:1 | AA | Lc -31.4 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CDDBEC
oklch(88.6% 0.028 253.2)
-
Step 300
300
#AAC3E1
oklch(80.8% 0.051 253.1)
-
Step 400
400
#7DA4D2
oklch(70.8% 0.08 253)
-
Step 500
500
#5B8DC6
oklch(63.2% 0.102 252.6)
-
Step 600
600 (this color)
#457BB8
oklch(57.4% 0.111 252.8)
-
Step 700
700
#326399
oklch(49.2% 0.102 252.6)
-
Step 800
800
#2A517C
oklch(42.8% 0.085 252.4)
-
Step 900
900
#264364
oklch(37.6% 0.067 252.8)
-
Step 950
950
#17273B
oklch(26.9% 0.043 254.6)
#457BB8 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) | #617EBB | 0.033 |
| Deuteranopia (no green cones) | #5173B7 | 0.024 |
| Tritanopia (no blue cones) | #008991 | 0.090 |
| Achromatopsia (no color) | #787878 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #457BB8
#457BB8
oklch(57.4% 0.111 252.8)
- #A06D1D
#A06D1D
oklch(57.5% 0.111 73.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #457BB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.020
- Steel Blue #4682B4 ΔE 0.023
- Cool Blue #4984B8 ΔE 0.027
- Flat Blue #3C73A8 ΔE 0.033
- Nice Blue #107AB0 ΔE 0.036
- Off Blue #5684AE ΔE 0.039
- Cerulean #457B9D ΔE 0.043
- Dull Blue #49759C ΔE 0.043
Use #457BB8 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.