#256EFA
Closest named color: Cerulean Blue (#056EEE). oklch(58% 0.221 261.8), rgb(37, 110, 250).
Aa
Black text reads best on this color (4.68:1).
About this color
#256EFA is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.221 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.022 away. Black text reads best on it, at 4.68:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.221) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.68:1 |
| White text | 4.47:1 |
Values
| HEX | #256EFA |
| RGB | rgb(37, 110, 250) |
| HSL | hsl(219, 96%, 56%) |
| OKLCH | oklch(58% 0.221 261.8) |
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 #256EFA | 4.47:1 | AA large text | Lc -75.8 | Fine for body text |
| Black text on #256EFA | 4.68:1 | AA | Lc 33.7 | Non-text elements, placeholder text |
| #256EFA text on white | 4.47:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #256EFA text on black | 4.68:1 | AA | Lc -31.3 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFE
oklch(93.5% 0.03 262.5)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6A9EFF
oklch(70.6% 0.153 261.9)
-
Step 500
500
#4082FF
oklch(63.1% 0.198 261.6)
-
Step 600
600 (this color)
#256EFA
oklch(58% 0.221 261.8)
-
Step 700
700
#1054D2
oklch(49.1% 0.205 261.7)
-
Step 800
800
#1145AA
oklch(42.6% 0.171 261.9)
-
Step 900
900
#153C87
oklch(37.7% 0.133 261.8)
-
Step 950
950
#0D244F
oklch(27% 0.084 261.5)
#256EFA 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) | #0081FF | 0.045 |
| Deuteranopia (no green cones) | #006EF7 | 0.013 |
| Tritanopia (no blue cones) | #0091A9 | 0.169 |
| Achromatopsia (no color) | #777777 | 0.222 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256EFA
#256EFA
oklch(58% 0.221 261.8)
- #9D7200
#9D7200
oklch(58% 0.119 82.2)
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 #256EFA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.022
- Bright Blue #0165FC ΔE 0.027
- Clear Blue #247AFD ΔE 0.029
- Neon Blue #4361EE ΔE 0.037
- Royal Blue #4169E1 ΔE 0.042
- Azul #1D5DEC ΔE 0.046
- Electric Blue #0652FF ΔE 0.066
- Warm Blue #4B57DB ΔE 0.071
Use #256EFA 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.