#457CDB
Closest named color: Windows Blue (#3778BF). oklch(59.6% 0.156 260.5), rgb(69, 124, 219).
Aa
Black text reads best on this color (5.15:1).
About this color
#457CDB is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.156 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.046 away. Black text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.156) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #457CDB |
| RGB | rgb(69, 124, 219) |
| HSL | hsl(218, 68%, 56%) |
| OKLCH | oklch(59.6% 0.156 260.5) |
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 #457CDB | 4.07:1 | AA large text | Lc -73.1 | Content text, not long reading |
| Black text on #457CDB | 5.15:1 | AA | Lc 36.5 | Non-text elements, placeholder text |
| #457CDB text on white | 4.07:1 | AA large text | Lc 67.6 | Content text, not long reading |
| #457CDB text on black | 5.15:1 | AA | Lc -34.1 | 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 500.
-
Step 50
50
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#C9DAF6
oklch(88.4% 0.043 260.4)
-
Step 300
300
#A5C2F3
oklch(81% 0.077 260.8)
-
Step 400
400
#74A1ED
oklch(70.8% 0.122 260.5)
-
Step 500
500 (this color)
#457CDB
oklch(59.6% 0.156 260.5)
-
Step 600
600
#336ED5
oklch(55.6% 0.17 260.7)
-
Step 700
700
#265BB9
oklch(49.1% 0.159 260.9)
-
Step 800
800
#204B95
oklch(42.6% 0.131 260.5)
-
Step 900
900
#204077
oklch(37.8% 0.101 260.5)
-
Step 950
950
#132646
oklch(27.1% 0.065 260.2)
#457CDB 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) | #4E85DF | 0.027 |
| Deuteranopia (no green cones) | #3477D9 | 0.021 |
| Tritanopia (no blue cones) | #0092A1 | 0.126 |
| Achromatopsia (no color) | #7E7E7E | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #457CDB
#457CDB
oklch(59.6% 0.156 260.5)
- #A57600
#A57600
oklch(59.8% 0.124 80.7)
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 #457CDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.048
- Water Blue #0E87CC ΔE 0.049
- Royal Blue #4169E1 ΔE 0.052
- Soft Blue #6488EA ΔE 0.053
- Clear Blue #247AFD ΔE 0.056
- Cornflower #6A79F7 ΔE 0.061
- Cerulean Blue #056EEE ΔE 0.062
Use #457CDB 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.