#256A91
Closest named color: Peacock Blue (#016795). oklch(50% 0.092 237.7), rgb(37, 106, 145).
Aa
White text reads best on this color (5.91:1).
About this color
#256A91 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.092 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.020 away. White text reads best on it, at 5.91:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.54:1 |
| White text | 5.91:1 |
Values
| HEX | #256A91 |
| RGB | rgb(37, 106, 145) |
| HSL | hsl(202, 59%, 36%) |
| OKLCH | oklch(50% 0.092 237.7) |
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 #256A91 | 5.91:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #256A91 | 3.54:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #256A91 text on white | 5.91:1 | AA | Lc 79.3 | Fine for body text |
| #256A91 text on black | 3.54:1 | AA large text | Lc -22.5 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CBDCE8
oklch(88.5% 0.025 238.4)
-
Step 300
300
#A7C5DA
oklch(80.8% 0.044 238.6)
-
Step 400
400
#76A8C8
oklch(70.8% 0.071 237.2)
-
Step 500
500
#5091BA
oklch(63% 0.091 238.2)
-
Step 600
600
#307BA6
oklch(55.6% 0.099 237.6)
-
Step 700
700 (this color)
#256A91
oklch(50% 0.092 237.7)
-
Step 800
800
#1F5574
oklch(42.9% 0.076 237.6)
-
Step 900
900
#1F465D
oklch(37.7% 0.059 237.1)
-
Step 950
950
#132937
oklch(27% 0.038 238.3)
#256A91 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) | #586A93 | 0.053 |
| Deuteranopia (no green cones) | #495F90 | 0.043 |
| Tritanopia (no blue cones) | #007477 | 0.061 |
| Achromatopsia (no color) | #646464 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256A91
#256A91
oklch(50% 0.092 237.7)
- #8A5529
#8A5529
oklch(50.1% 0.092 58)
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 #256A91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.020
- Ocean Blue #03719C ΔE 0.024
- Denim #3B638C ΔE 0.025
- Sea Blue #047495 ΔE 0.029
- Muted Blue #3B719F ΔE 0.036
- Dusky Blue #475F94 ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.046
Use #256A91 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.