#256F90
Closest named color: Sea Blue (#047495). oklch(51.2% 0.088 231.6), rgb(37, 111, 144).
Aa
White text reads best on this color (5.59:1).
About this color
#256F90 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.088 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.017 away. White text reads best on it, at 5.59:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.75:1 |
| White text | 5.59:1 |
Values
| HEX | #256F90 |
| RGB | rgb(37, 111, 144) |
| HSL | hsl(199, 59%, 35%) |
| OKLCH | oklch(51.2% 0.088 231.6) |
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 #256F90 | 5.59:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #256F90 | 3.75:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #256F90 text on white | 5.59:1 | AA | Lc 77.7 | Fine for body text |
| #256F90 text on black | 3.75:1 | AA large text | Lc -24.1 | 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
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#CADCE6
oklch(88.4% 0.024 231.9)
-
Step 300
300
#A6C6D8
oklch(80.9% 0.043 232.7)
-
Step 400
400
#74A9C4
oklch(70.8% 0.068 231.1)
-
Step 500
500
#4D93B5
oklch(63.1% 0.087 231.5)
-
Step 600
600
#2C7DA1
oklch(55.7% 0.095 231.4)
-
Step 700
700 (this color)
#256F90
oklch(51.2% 0.088 231.6)
-
Step 800
800
#1B5670
oklch(42.8% 0.073 231.3)
-
Step 900
900
#1E475A
oklch(37.7% 0.056 230.9)
-
Step 950
950
#122A35
oklch(27.1% 0.036 229.8)
#256F90 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) | #5E6E92 | 0.058 |
| Deuteranopia (no green cones) | #506390 | 0.051 |
| Tritanopia (no blue cones) | #00787A | 0.053 |
| Achromatopsia (no color) | #686868 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256F90
#256F90
oklch(51.2% 0.088 231.6)
- #8E5735
#8E5735
oklch(51.1% 0.088 51.4)
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 #256F90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.017
- Ocean Blue #03719C ΔE 0.021
- Muted Blue #3B719F ΔE 0.031
- Peacock Blue #016795 ΔE 0.033
- Ocean #017B92 ΔE 0.036
- Denim #3B638C ΔE 0.036
- Metallic Blue #4F738E ΔE 0.042
- Dull Blue #49759C ΔE 0.043
Use #256F90 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.