#256B81
Closest named color: Sea Blue (#047495). oklch(49.4% 0.076 222.6), rgb(37, 107, 129).
Aa
White text reads best on this color (6.00:1).
About this color
#256B81 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.076 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.036 away. White text reads best on it, at 6.00:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.49:1 |
| White text | 6.00:1 |
Values
| HEX | #256B81 |
| RGB | rgb(37, 107, 129) |
| HSL | hsl(194, 55%, 33%) |
| OKLCH | oklch(49.4% 0.076 222.6) |
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 #256B81 | 6.00:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #256B81 | 3.49:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #256B81 text on white | 6.00:1 | AA | Lc 79.7 | Fine for body text |
| #256B81 text on black | 3.49:1 | AA large text | Lc -22.1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3ECEF
oklch(93.7% 0.01 219.6)
-
Step 200
200
#CBDCE3
oklch(88.4% 0.021 224.3)
-
Step 300
300
#A8C6D2
oklch(80.8% 0.036 224)
-
Step 400
400
#77A9BB
oklch(70.6% 0.059 222.4)
-
Step 500
500
#5294AB
oklch(63.2% 0.076 222.8)
-
Step 600
600
#327E96
oklch(55.6% 0.082 222.2)
-
Step 700
700 (this color)
#256B81
oklch(49.4% 0.076 222.6)
-
Step 800
800
#205768
oklch(42.8% 0.063 221.7)
-
Step 900
900
#204755
oklch(37.6% 0.05 224.1)
-
Step 950
950
#142A32
oklch(27.1% 0.032 223.6)
#256B81 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) | #5E6882 | 0.061 |
| Deuteranopia (no green cones) | #515F81 | 0.054 |
| Tritanopia (no blue cones) | #007272 | 0.040 |
| Achromatopsia (no color) | #636363 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256B81
#256B81
oklch(49.4% 0.076 222.6)
- #86533E
#86533E
oklch(49.5% 0.076 43)
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 #256B81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.036
- Denim #3B638C ΔE 0.038
- Deep Turquoise #017374 ΔE 0.040
- Peacock Blue #016795 ΔE 0.040
- Dark Aqua #05696B ΔE 0.040
- Deep Aqua #08787F ΔE 0.042
- Ocean Blue #03719C ΔE 0.043
- Dark Aquamarine #017371 ΔE 0.044
Use #256B81 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.