#256AA9
Closest named color: Mid Blue (#276AB3). oklch(51.3% 0.121 249.8), rgb(37, 106, 169).
Aa
White text reads best on this color (5.65:1).
About this color
#256AA9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.121 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.016 away. White text reads best on it, at 5.65:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.71:1 |
| White text | 5.65:1 |
Values
| HEX | #256AA9 |
| RGB | rgb(37, 106, 169) |
| HSL | hsl(209, 64%, 40%) |
| OKLCH | oklch(51.3% 0.121 249.8) |
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 #256AA9 | 5.65:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #256AA9 | 3.71:1 | AA large text | Lc 26.2 | Dividers and decoration only |
| #256AA9 text on white | 5.65:1 | AA | Lc 77.9 | Fine for body text |
| #256AA9 text on black | 3.71:1 | AA large text | Lc -23.9 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEE
oklch(88.5% 0.032 251.1)
-
Step 300
300
#A4C4E6
oklch(80.8% 0.059 250.1)
-
Step 400
400
#73A5D9
oklch(70.7% 0.093 250.2)
-
Step 500
500
#4B8ECF
oklch(63.2% 0.12 249.6)
-
Step 600
600
#2B77BC
oklch(55.7% 0.13 249.7)
-
Step 700
700 (this color)
#256AA9
oklch(51.3% 0.121 249.8)
-
Step 800
800
#1B5183
oklch(42.6% 0.1 250.1)
-
Step 900
900
#1D4469
oklch(37.8% 0.077 249.6)
-
Step 950
950
#12283E
oklch(27.1% 0.05 250.2)
#256AA9 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) | #4D6EAC | 0.041 |
| Deuteranopia (no green cones) | #3962A8 | 0.025 |
| Tritanopia (no blue cones) | #007981 | 0.089 |
| Achromatopsia (no color) | #676767 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256AA9
#256AA9
oklch(51.3% 0.121 249.8)
- #8F5900
#8F5900
oklch(51.2% 0.111 69.4)
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 #256AA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.016
- French Blue #436BAD ΔE 0.028
- Ocean Blue #03719C ΔE 0.034
- Muted Blue #3B719F ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.035
- Peacock Blue #016795 ΔE 0.037
- Nice Blue #107AB0 ΔE 0.045
- Dusky Blue #475F94 ΔE 0.047
Use #256AA9 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.