#256E61
Closest named color: Dark Aquamarine (#017371). oklch(48.9% 0.075 179), rgb(37, 110, 97).
Aa
White text reads best on this color (6.03:1).
About this color
#256E61 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.075 and its hue 179°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.026 away. White text reads best on it, at 6.03:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.48:1 |
| White text | 6.03:1 |
Values
| HEX | #256E61 |
| RGB | rgb(37, 110, 97) |
| HSL | hsl(169, 50%, 29%) |
| OKLCH | oklch(48.9% 0.075 179) |
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 #256E61 | 6.03:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #256E61 | 3.48:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #256E61 text on white | 6.03:1 | AA | Lc 79.9 | Fine for body text |
| #256E61 text on black | 3.48:1 | AA large text | Lc -21.9 | 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
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDED9
oklch(88.6% 0.02 177.4)
-
Step 300
300
#A9C9C1
oklch(81% 0.036 178.5)
-
Step 400
400
#79ADA1
oklch(70.8% 0.058 178.6)
-
Step 500
500
#53988A
oklch(63% 0.074 179.1)
-
Step 600
600
#348374
oklch(55.7% 0.081 178.6)
-
Step 700
700 (this color)
#256E61
oklch(48.9% 0.075 179)
-
Step 800
800
#215A50
oklch(42.7% 0.062 179.7)
-
Step 900
900
#214A42
oklch(37.7% 0.048 179.1)
-
Step 950
950
#152B27
oklch(26.9% 0.029 181)
#256E61 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) | #696760 | 0.078 |
| Deuteranopia (no green cones) | #5F6062 | 0.074 |
| Tritanopia (no blue cones) | #00706A | 0.017 |
| Achromatopsia (no color) | #636363 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256E61
#256E61
oklch(48.9% 0.075 179)
- #834E5F
#834E5F
oklch(49% 0.075 359.5)
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 #256E61, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.026
- Deep Turquoise #017374 ΔE 0.029
- Dark Aqua #05696B ΔE 0.030
- Dark Green Blue #1F6357 ΔE 0.036
- Bluegreen #017A79 ΔE 0.043
- Deep Aqua #08787F ΔE 0.048
- Petrol #005F6A ΔE 0.059
- Teal #008080 ΔE 0.061
Use #256E61 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.