#256D5B
Closest named color: Dark Green Blue (#1F6357). oklch(48.5% 0.077 173.3), rgb(37, 109, 91).
Aa
White text reads best on this color (6.14:1).
About this color
#256D5B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 48%, its chroma 0.077 and its hue 173°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.032 away. White text reads best on it, at 6.14:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 3.41:1 |
| White text | 6.14:1 |
Values
| HEX | #256D5B |
| RGB | rgb(37, 109, 91) |
| HSL | hsl(165, 49%, 29%) |
| OKLCH | oklch(48.5% 0.077 173.3) |
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 #256D5B | 6.14:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #256D5B | 3.41:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #256D5B text on white | 6.14:1 | AA | Lc 80.4 | Fine for body text |
| #256D5B text on black | 3.41:1 | AA large text | Lc -21.4 | 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
#7AAD9D
oklch(70.7% 0.059 173.1)
-
Step 500
500
#549985
oklch(63.1% 0.077 172.9)
-
Step 600
600
#36836F
oklch(55.6% 0.082 173.4)
-
Step 700
700 (this color)
#256D5B
oklch(48.5% 0.077 173.3)
-
Step 800
800
#235A4C
oklch(42.6% 0.063 173.8)
-
Step 900
900
#224A3F
oklch(37.6% 0.05 173.4)
-
Step 950
950
#152C25
oklch(27.2% 0.032 172.2)
#256D5B 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) | #69665A | 0.079 |
| Deuteranopia (no green cones) | #5F5E5C | 0.077 |
| Tritanopia (no blue cones) | #006E68 | 0.022 |
| Achromatopsia (no color) | #626262 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256D5B
#256D5B
oklch(48.5% 0.077 173.3)
- #814C62
#814C62
oklch(48.5% 0.077 353.9)
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 #256D5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.032
- Dark Aquamarine #017371 ΔE 0.034
- Dark Aqua #05696B ΔE 0.034
- Deep Turquoise #017374 ΔE 0.038
- Bluegreen #017A79 ΔE 0.051
- Deep Aqua #08787F ΔE 0.056
- Petrol #005F6A ΔE 0.062
- Pine #2B5D34 ΔE 0.064
Use #256D5B 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.