#256AB7
Closest named color: Mid Blue (#276AB3). oklch(52.2% 0.139 254), rgb(37, 106, 183).
Aa
White text reads best on this color (5.49:1).
About this color
#256AB7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.139 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.006 away. White text reads best on it, at 5.49:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.82:1 |
| White text | 5.49:1 |
Values
| HEX | #256AB7 |
| RGB | rgb(37, 106, 183) |
| HSL | hsl(212, 66%, 43%) |
| OKLCH | oklch(52.2% 0.139 254) |
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 #256AB7 | 5.49:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #256AB7 | 3.82:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #256AB7 text on white | 5.49:1 | AA | Lc 77.0 | Fine for body text |
| #256AB7 text on black | 3.82:1 | AA large text | Lc -24.8 | 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 700.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C9DBF2
oklch(88.5% 0.037 254.6)
-
Step 300
300
#A3C4EC
oklch(81% 0.067 253.5)
-
Step 400
400
#70A4E2
oklch(70.7% 0.107 253.5)
-
Step 500
500
#498BDA
oklch(63% 0.137 254.3)
-
Step 600
600
#2874C8
oklch(55.7% 0.149 254)
-
Step 700
700 (this color)
#256AB7
oklch(52.2% 0.139 254)
-
Step 800
800
#194F8C
oklch(42.7% 0.115 254.3)
-
Step 900
900
#1B4270
oklch(37.6% 0.091 254.4)
-
Step 950
950
#112741
oklch(26.9% 0.056 253.9)
#256AB7 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) | #4470BA | 0.034 |
| Deuteranopia (no green cones) | #2A63B5 | 0.019 |
| Tritanopia (no blue cones) | #007C87 | 0.105 |
| Achromatopsia (no color) | #696969 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256AB7
#256AB7
oklch(52.2% 0.139 254)
- #8F5E00
#8F5E00
oklch(52.2% 0.111 73.8)
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 #256AB7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.006
- French Blue #436BAD ΔE 0.030
- Flat Blue #3C73A8 ΔE 0.043
- Windows Blue #3778BF ΔE 0.044
- Nice Blue #107AB0 ΔE 0.049
- Muted Blue #3B719F ΔE 0.050
- Ocean Blue #03719C ΔE 0.053
- Peacock Blue #016795 ΔE 0.058
Use #256AB7 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.