#457BC9
Closest named color: Windows Blue (#3778BF). oklch(58.3% 0.133 257.7), rgb(69, 123, 201).
Aa
Black text reads best on this color (4.92:1).
About this color
#457BC9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.133 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.022 away. Black text reads best on it, at 4.92:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.92:1 |
| White text | 4.25:1 |
Values
| HEX | #457BC9 |
| RGB | rgb(69, 123, 201) |
| HSL | hsl(215, 55%, 53%) |
| OKLCH | oklch(58.3% 0.133 257.7) |
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 #457BC9 | 4.25:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #457BC9 | 4.92:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #457BC9 text on white | 4.25:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #457BC9 text on black | 4.92:1 | AA | Lc -32.5 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CCDAF0
oklch(88.5% 0.034 259.4)
-
Step 300
300
#A9C2E8
oklch(80.8% 0.061 258.7)
-
Step 400
400
#7AA2DC
oklch(70.6% 0.096 257.6)
-
Step 500
500
#588AD3
oklch(63.1% 0.123 257.8)
-
Step 600
600 (this color)
#457BC9
oklch(58.3% 0.133 257.7)
-
Step 700
700
#2F60A6
oklch(49.2% 0.124 257.7)
-
Step 800
800
#284F86
oklch(42.8% 0.102 257.3)
-
Step 900
900
#25426B
oklch(37.8% 0.079 257.2)
-
Step 950
950
#16273F
oklch(27.1% 0.05 257.1)
#457BC9 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) | #5881CC | 0.028 |
| Deuteranopia (no green cones) | #4575C7 | 0.016 |
| Tritanopia (no blue cones) | #008D98 | 0.109 |
| Achromatopsia (no color) | #7B7B7B | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #457BC9
#457BC9
oklch(58.3% 0.133 257.7)
- #A27000
#A27000
oklch(58.2% 0.121 77.7)
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 #457BC9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.022
- Water Blue #0E87CC ΔE 0.039
- Cool Blue #4984B8 ΔE 0.041
- Steel Blue #4682B4 ΔE 0.042
- Nice Blue #107AB0 ΔE 0.053
- Flat Blue #3C73A8 ΔE 0.054
- Off Blue #5684AE ΔE 0.057
- French Blue #436BAD ΔE 0.057
Use #457BC9 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.