#256F5C
Closest named color: Dark Aquamarine (#017371). oklch(49.1% 0.079 172.7), rgb(37, 111, 92).
Aa
White text reads best on this color (5.98:1).
About this color
#256F5C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.079 and its hue 173°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.032 away. White text reads best on it, at 5.98:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.50:1 |
| White text | 5.98:1 |
Values
| HEX | #256F5C |
| RGB | rgb(37, 111, 92) |
| HSL | hsl(165, 50%, 29%) |
| OKLCH | oklch(49.1% 0.079 172.7) |
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 #256F5C | 5.98:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #256F5C | 3.50:1 | AA large text | Lc 24.4 | Dividers and decoration only |
| #256F5C text on white | 5.98:1 | AA | Lc 79.7 | Fine for body text |
| #256F5C text on black | 3.50:1 | AA large text | Lc -22.2 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CCDED8
oklch(88.5% 0.021 173.9)
-
Step 300
300
#A9C9BE
oklch(80.9% 0.038 172.5)
-
Step 400
400
#79AD9D
oklch(70.6% 0.06 173.4)
-
Step 500
500
#539985
oklch(63.1% 0.078 173.1)
-
Step 600
600
#34836E
oklch(55.5% 0.084 172.8)
-
Step 700
700 (this color)
#256F5C
oklch(49.1% 0.079 172.7)
-
Step 800
800
#215B4B
oklch(42.8% 0.066 171.9)
-
Step 900
900
#214A3F
oklch(37.6% 0.05 173.7)
-
Step 950
950
#142C25
oklch(27.1% 0.033 172.8)
#256F5C 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) | #6B685B | 0.081 |
| Deuteranopia (no green cones) | #61605D | 0.078 |
| Tritanopia (no blue cones) | #007069 | 0.022 |
| Achromatopsia (no color) | #636363 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256F5C
#256F5C
oklch(49.1% 0.079 172.7)
- #834D65
#834D65
oklch(49% 0.079 352.3)
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 #256F5C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.032
- Deep Turquoise #017374 ΔE 0.036
- Dark Aqua #05696B ΔE 0.038
- Dark Green Blue #1F6357 ΔE 0.039
- Bluegreen #017A79 ΔE 0.047
- Deep Aqua #08787F ΔE 0.053
- Teal #008080 ΔE 0.063
- Petrol #005F6A ΔE 0.066
Use #256F5C 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.