#257AE8
Closest named color: Clear Blue (#247AFD). oklch(59.1% 0.185 257.1), rgb(37, 122, 232).
Aa
Black text reads best on this color (5.02:1).
About this color
#257AE8 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.185 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.032 away. Black text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.02:1 |
| White text | 4.17:1 |
Values
| HEX | #257AE8 |
| RGB | rgb(37, 122, 232) |
| HSL | hsl(214, 81%, 53%) |
| OKLCH | oklch(59.1% 0.185 257.1) |
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 #257AE8 | 4.17:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #257AE8 | 5.02:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #257AE8 text on white | 4.17:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #257AE8 text on black | 5.02:1 | AA | Lc -33.5 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF8
oklch(88.5% 0.046 256.5)
-
Step 300
300
#9FC3F6
oklch(80.9% 0.082 257.1)
-
Step 400
400
#69A2F2
oklch(70.7% 0.132 257)
-
Step 500
500
#3D88EE
oklch(63.1% 0.17 257.1)
-
Step 600
600 (this color)
#257AE8
oklch(59.1% 0.185 257.1)
-
Step 700
700
#055CBF
oklch(49.1% 0.172 257.1)
-
Step 800
800
#0C4C9A
oklch(42.7% 0.141 256.9)
-
Step 900
900
#14407B
oklch(37.7% 0.111 257.2)
-
Step 950
950
#0D2648
oklch(27% 0.07 257)
#257AE8 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) | #3A85EC | 0.034 |
| Deuteranopia (no green cones) | #0074E6 | 0.022 |
| Tritanopia (no blue cones) | #0095A6 | 0.140 |
| Achromatopsia (no color) | #7C7C7C | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257AE8
#257AE8
oklch(59.1% 0.185 257.1)
- #A67200
#A67200
oklch(59.1% 0.124 77.1)
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 #257AE8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.032
- Cerulean Blue #056EEE ΔE 0.036
- Royal Blue #4169E1 ΔE 0.043
- Water Blue #0E87CC ΔE 0.060
- Neon Blue #4361EE ΔE 0.062
- Dark Sky Blue #448EE4 ΔE 0.062
- Windows Blue #3778BF ΔE 0.063
- Dodger Blue #1E90FF ΔE 0.063
Use #257AE8 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.