#457FDB
Closest named color: Dark Sky Blue (#448EE4). oklch(60.3% 0.153 259.3), rgb(69, 127, 219).
Aa
Black text reads best on this color (5.31:1).
About this color
#457FDB is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.153 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.040 away. Black text reads best on it, at 5.31:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.31:1 |
| White text | 3.95:1 |
Values
| HEX | #457FDB |
| RGB | rgb(69, 127, 219) |
| HSL | hsl(217, 68%, 56%) |
| OKLCH | oklch(60.3% 0.153 259.3) |
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 #457FDB | 3.95:1 | AA large text | Lc -72.1 | Content text, not long reading |
| Black text on #457FDB | 5.31:1 | AA | Lc 37.5 | Non-text elements, placeholder text |
| #457FDB text on white | 3.95:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #457FDB text on black | 5.31:1 | AA | Lc -35.1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C9DAF5
oklch(88.4% 0.042 259.6)
-
Step 300
300
#A4C2F1
oklch(80.8% 0.074 259.3)
-
Step 400
400
#73A1EB
oklch(70.7% 0.12 259.6)
-
Step 500
500 (this color)
#457FDB
oklch(60.3% 0.153 259.3)
-
Step 600
600
#306FD3
oklch(55.5% 0.167 259.4)
-
Step 700
700
#235DB6
oklch(49.2% 0.154 259.1)
-
Step 800
800
#1E4C94
oklch(42.7% 0.129 259.3)
-
Step 900
900
#1E4076
oklch(37.7% 0.101 259.3)
-
Step 950
950
#122645
oklch(27% 0.064 258.9)
#457FDB 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) | #5387DF | 0.027 |
| Deuteranopia (no green cones) | #3B7AD9 | 0.017 |
| Tritanopia (no blue cones) | #0094A2 | 0.122 |
| Achromatopsia (no color) | #808080 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #457FDB
#457FDB
oklch(60.3% 0.153 259.3)
- #A87700
#A87700
oklch(60.3% 0.125 79.8)
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 #457FDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.040
- Water Blue #0E87CC ΔE 0.044
- Soft Blue #6488EA ΔE 0.048
- Windows Blue #3778BF ΔE 0.048
- Clear Blue #247AFD ΔE 0.058
- Cool Blue #4984B8 ΔE 0.059
- Royal Blue #4169E1 ΔE 0.059
- Cornflower #6A79F7 ΔE 0.062
Use #457FDB 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.