#256C6B
Closest named color: Dark Aqua (#05696B). oklch(48.8% 0.069 193.8), rgb(37, 108, 107).
Aa
White text reads best on this color (6.11:1).
About this color
#256C6B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 49%, its chroma 0.069 and its hue 194°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.018 away. White text reads best on it, at 6.11:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.43:1 |
| White text | 6.11:1 |
Values
| HEX | #256C6B |
| RGB | rgb(37, 108, 107) |
| HSL | hsl(179, 49%, 28%) |
| OKLCH | oklch(48.8% 0.069 193.8) |
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 #256C6B | 6.11:1 | AA | Lc -85.4 | Fine for body text |
| Black text on #256C6B | 3.43:1 | AA large text | Lc 23.8 | Dividers and decoration only |
| #256C6B text on white | 6.11:1 | AA | Lc 80.3 | Fine for body text |
| #256C6B text on black | 3.43:1 | AA large text | Lc -21.6 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CCDDDC
oklch(88.4% 0.018 192.6)
-
Step 300
300
#A9C8C7
oklch(81% 0.033 194.1)
-
Step 400
400
#79ACAA
oklch(70.8% 0.054 192.9)
-
Step 500
500
#549795
oklch(63.2% 0.069 193.1)
-
Step 600
600
#358180
oklch(55.6% 0.074 194)
-
Step 700
700 (this color)
#256C6B
oklch(48.8% 0.069 193.8)
-
Step 800
800
#225958
oklch(42.7% 0.057 193.6)
-
Step 900
900
#224948
oklch(37.7% 0.044 193.2)
-
Step 950
950
#152B2A
oklch(27% 0.028 191.9)
#256C6B 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) | #65676B | 0.072 |
| Deuteranopia (no green cones) | #5A5E6C | 0.069 |
| Tritanopia (no blue cones) | #006F6B | 0.016 |
| Achromatopsia (no color) | #626262 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256C6B
#256C6B
oklch(48.8% 0.069 193.8)
- #824F54
#824F54
oklch(48.7% 0.069 13.6)
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 #256C6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.018
- Dark Aquamarine #017371 ΔE 0.022
- Deep Turquoise #017374 ΔE 0.023
- Dark Green Blue #1F6357 ΔE 0.038
- Deep Aqua #08787F ΔE 0.041
- Bluegreen #017A79 ΔE 0.042
- Petrol #005F6A ΔE 0.048
- Slate #516572 ΔE 0.051
Use #256C6B 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.