#256CCB
Closest named color: Mid Blue (#276AB3). oklch(54% 0.163 257.3), rgb(37, 108, 203).
Aa
White text reads best on this color (5.13:1).
About this color
#256CCB is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.163 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.037 away. White text reads best on it, at 5.13:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.08:1 |
| White text | 5.13:1 |
Values
| HEX | #256CCB |
| RGB | rgb(37, 108, 203) |
| HSL | hsl(214, 69%, 47%) |
| OKLCH | oklch(54% 0.163 257.3) |
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 #256CCB | 5.13:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #256CCB | 4.08:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #256CCB text on white | 5.13:1 | AA | Lc 74.9 | Content text, not long reading |
| #256CCB text on black | 4.08:1 | AA large text | Lc -26.8 | Dividers and decoration only |
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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C9DBF5
oklch(88.6% 0.041 257.5)
-
Step 300
300
#A3C3F0
oklch(80.9% 0.073 256.9)
-
Step 400
400
#70A2E9
oklch(70.6% 0.118 257.2)
-
Step 500
500
#4A89E2
oklch(63.1% 0.15 257.4)
-
Step 600
600 (this color)
#256CCB
oklch(54% 0.163 257.3)
-
Step 700
700
#1D5EB4
oklch(49.1% 0.151 257.2)
-
Step 800
800
#1A4D92
oklch(42.6% 0.126 257.3)
-
Step 900
900
#1C4174
oklch(37.7% 0.097 257.1)
-
Step 950
950
#112644
oklch(26.9% 0.062 257.5)
#256CCB 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) | #3775CF | 0.030 |
| Deuteranopia (no green cones) | #0067C9 | 0.021 |
| Tritanopia (no blue cones) | #008391 | 0.126 |
| Achromatopsia (no color) | #6D6D6D | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256CCB
#256CCB
oklch(54% 0.163 257.3)
- #936500
#936500
oklch(54.1% 0.113 77.5)
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 #256CCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.037
- Royal Blue #4169E1 ΔE 0.042
- Windows Blue #3778BF ΔE 0.044
- French Blue #436BAD ΔE 0.051
- Cerulean Blue #056EEE ΔE 0.054
- Nice Blue #107AB0 ΔE 0.063
- Warm Blue #4B57DB ΔE 0.064
- Flat Blue #3C73A8 ΔE 0.064
Use #256CCB 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.