#256BA0
Closest named color: Ocean Blue (#03719C). oklch(51% 0.109 245.4), rgb(37, 107, 160).
Aa
White text reads best on this color (5.69:1).
About this color
#256BA0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.109 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.023 away. White text reads best on it, at 5.69:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.68:1 |
| White text | 5.69:1 |
Values
| HEX | #256BA0 |
| RGB | rgb(37, 107, 160) |
| HSL | hsl(206, 62%, 39%) |
| OKLCH | oklch(51% 0.109 245.4) |
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 #256BA0 | 5.69:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #256BA0 | 3.68:1 | AA large text | Lc 25.9 | Dividers and decoration only |
| #256BA0 text on white | 5.69:1 | AA | Lc 78.1 | Fine for body text |
| #256BA0 text on black | 3.68:1 | AA large text | Lc -23.6 | 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 700.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADCEC
oklch(88.6% 0.029 244.9)
-
Step 300
300
#A5C5E1
oklch(80.9% 0.053 244.9)
-
Step 400
400
#74A6D2
oklch(70.7% 0.084 245.9)
-
Step 500
500
#4D8FC6
oklch(63% 0.107 245.8)
-
Step 600
600
#2C79B3
oklch(55.7% 0.117 245.2)
-
Step 700
700 (this color)
#256BA0
oklch(51% 0.109 245.4)
-
Step 800
800
#1C537D
oklch(42.8% 0.09 245.5)
-
Step 900
900
#1D4564
oklch(37.7% 0.07 244.6)
-
Step 950
950
#12283B
oklch(26.9% 0.045 246.6)
#256BA0 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) | #536DA2 | 0.046 |
| Deuteranopia (no green cones) | #41619F | 0.034 |
| Tritanopia (no blue cones) | #00787E | 0.078 |
| Achromatopsia (no color) | #676767 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256BA0
#256BA0
oklch(51% 0.109 245.4)
- #90570E
#90570E
oklch(51% 0.109 65.1)
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 #256BA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.023
- Peacock Blue #016795 ΔE 0.027
- Muted Blue #3B719F ΔE 0.027
- Mid Blue #276AB3 ΔE 0.031
- Flat Blue #3C73A8 ΔE 0.033
- French Blue #436BAD ΔE 0.035
- Denim #3B638C ΔE 0.036
- Sea Blue #047495 ΔE 0.037
Use #256BA0 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.