#256F8D
Closest named color: Sea Blue (#047495). oklch(51% 0.085 229.1), rgb(37, 111, 141).
Aa
White text reads best on this color (5.61:1).
About this color
#256F8D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.085 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.018 away. White text reads best on it, at 5.61:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.73:1 |
| White text | 5.61:1 |
Values
| HEX | #256F8D |
| RGB | rgb(37, 111, 141) |
| HSL | hsl(197, 58%, 35%) |
| OKLCH | oklch(51% 0.085 229.1) |
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 #256F8D | 5.61:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #256F8D | 3.73:1 | AA large text | Lc 26.3 | Dividers and decoration only |
| #256F8D text on white | 5.61:1 | AA | Lc 77.8 | Fine for body text |
| #256F8D text on black | 3.73:1 | AA large text | Lc -24.0 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADCE5
oklch(88.4% 0.023 229.1)
-
Step 300
300
#A6C6D6
oklch(80.8% 0.041 229.5)
-
Step 400
400
#75A9C2
oklch(70.7% 0.066 229.5)
-
Step 500
500
#4D93B2
oklch(63% 0.084 229)
-
Step 600
600
#2D7D9E
oklch(55.6% 0.091 229.3)
-
Step 700
700 (this color)
#256F8D
oklch(51% 0.085 229.1)
-
Step 800
800
#1C566E
oklch(42.7% 0.071 229.4)
-
Step 900
900
#1E4759
oklch(37.7% 0.055 229.4)
-
Step 950
950
#132A34
oklch(27.1% 0.034 228.3)
#256F8D 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) | #5F6D8E | 0.060 |
| Deuteranopia (no green cones) | #51638D | 0.052 |
| Tritanopia (no blue cones) | #007779 | 0.049 |
| Achromatopsia (no color) | #676767 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256F8D
#256F8D
oklch(51% 0.085 229.1)
- #8D5738
#8D5738
oklch(51.1% 0.085 49.9)
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 #256F8D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.018
- Ocean Blue #03719C ΔE 0.025
- Peacock Blue #016795 ΔE 0.035
- Ocean #017B92 ΔE 0.035
- Muted Blue #3B719F ΔE 0.036
- Denim #3B638C ΔE 0.038
- Deep Aqua #08787F ΔE 0.042
- Metallic Blue #4F738E ΔE 0.042
Use #256F8D 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.