#256D77
Closest named color: Deep Turquoise (#017374). oklch(49.5% 0.071 208.1), rgb(37, 109, 119).
Aa
White text reads best on this color (5.94:1).
About this color
#256D77 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.071 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Turquoise (#017374), ΔE 0.024 away. White text reads best on it, at 5.94:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Deep Turquoise (#017374) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #256D77 |
| RGB | rgb(37, 109, 119) |
| HSL | hsl(187, 53%, 31%) |
| OKLCH | oklch(49.5% 0.071 208.1) |
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 #256D77 | 5.94:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #256D77 | 3.53:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #256D77 text on white | 5.94:1 | AA | Lc 79.5 | Fine for body text |
| #256D77 text on black | 3.53:1 | AA large text | Lc -22.3 | 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
#CBDDE0
oklch(88.5% 0.02 208.8)
-
Step 300
300
#A8C7CC
oklch(80.8% 0.034 208.4)
-
Step 400
400
#78ABB3
oklch(70.8% 0.055 208.2)
-
Step 500
500
#5296A0
oklch(63.2% 0.07 207.8)
-
Step 600
600
#32808B
oklch(55.7% 0.077 208)
-
Step 700
700 (this color)
#256D77
oklch(49.5% 0.071 208.1)
-
Step 800
800
#205860
oklch(42.7% 0.059 208.2)
-
Step 900
900
#20484E
oklch(37.5% 0.046 208.3)
-
Step 950
950
#142A2E
oklch(26.9% 0.029 210.5)
#256D77 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) | #636978 | 0.068 |
| Deuteranopia (no green cones) | #576077 | 0.062 |
| Tritanopia (no blue cones) | #007270 | 0.026 |
| Achromatopsia (no color) | #646464 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256D77
#256D77
oklch(49.5% 0.071 208.1)
- #86524B
#86524B
oklch(49.6% 0.071 28.2)
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 #256D77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Turquoise #017374 ΔE 0.024
- Dark Aquamarine #017371 ΔE 0.027
- Dark Aqua #05696B ΔE 0.027
- Deep Aqua #08787F ΔE 0.033
- Bluegreen #017A79 ΔE 0.040
- Slate #516572 ΔE 0.046
- Sea Blue #047495 ΔE 0.047
- Ocean #017B92 ΔE 0.051
Use #256D77 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.