#256B77
Closest named color: Dark Aqua (#05696B). oklch(49% 0.071 211), rgb(37, 107, 119).
Aa
White text reads best on this color (6.09:1).
About this color
#256B77 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.071 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.026 away. White text reads best on it, at 6.09:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.44:1 |
| White text | 6.09:1 |
Values
| HEX | #256B77 |
| RGB | rgb(37, 107, 119) |
| HSL | hsl(189, 53%, 31%) |
| OKLCH | oklch(49% 0.071 211) |
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 #256B77 | 6.09:1 | AA | Lc -85.3 | Fine for body text |
| Black text on #256B77 | 3.44:1 | AA large text | Lc 23.9 | Dividers and decoration only |
| #256B77 text on white | 6.09:1 | AA | Lc 80.2 | Fine for body text |
| #256B77 text on black | 3.44:1 | AA large text | Lc -21.7 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CCDDE0
oklch(88.6% 0.019 209.4)
-
Step 300
300
#A8C7CD
oklch(80.9% 0.034 210.7)
-
Step 400
400
#78AAB4
oklch(70.6% 0.055 211.4)
-
Step 500
500
#5395A1
oklch(63.1% 0.07 210.6)
-
Step 600
600
#347F8C
oklch(55.5% 0.076 210.7)
-
Step 700
700 (this color)
#256B77
oklch(49% 0.071 211)
-
Step 800
800
#215861
oklch(42.8% 0.059 209.9)
-
Step 900
900
#21484F
oklch(37.6% 0.046 210.7)
-
Step 950
950
#142A2E
oklch(26.9% 0.029 210.5)
#256B77 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) | #616778 | 0.066 |
| Deuteranopia (no green cones) | #555E77 | 0.061 |
| Tritanopia (no blue cones) | #00706F | 0.027 |
| Achromatopsia (no color) | #626262 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256B77
#256B77
oklch(49% 0.071 211)
- #845148
#845148
oklch(49.1% 0.071 30.6)
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 #256B77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.026
- Deep Turquoise #017374 ΔE 0.029
- Dark Aquamarine #017371 ΔE 0.032
- Deep Aqua #08787F ΔE 0.038
- Slate #516572 ΔE 0.045
- Petrol #005F6A ΔE 0.046
- Bluegreen #017A79 ΔE 0.046
- Sea Blue #047495 ΔE 0.048
Use #256B77 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.