#257156
Closest named color: Dark Aquamarine (#017371). oklch(49.4% 0.086 165.8), rgb(37, 113, 86).
Aa
White text reads best on this color (5.87:1).
About this color
#257156 is a medium-dark, moderately saturated green. In OKLCH its lightness is 49%, its chroma 0.086 and its hue 166°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.041 away. White text reads best on it, at 5.87:1.
| Hue family | Greens |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.086) |
| Temperature | in between |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.57:1 |
| White text | 5.87:1 |
Values
| HEX | #257156 |
| RGB | rgb(37, 113, 86) |
| HSL | hsl(159, 51%, 29%) |
| OKLCH | oklch(49.4% 0.086 165.8) |
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 #257156 | 5.87:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #257156 | 3.57:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #257156 text on white | 5.87:1 | AA | Lc 79.1 | Fine for body text |
| #257156 text on black | 3.57:1 | AA large text | Lc -22.7 | 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
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E3EDE8
oklch(93.7% 0.013 164.8)
-
Step 200
200
#CCDED5
oklch(88.5% 0.023 164.5)
-
Step 300
300
#A8CABA
oklch(81% 0.043 165.2)
-
Step 400
400
#78AE97
oklch(70.6% 0.066 166.1)
-
Step 500
500
#529A7D
oklch(63.1% 0.086 165.6)
-
Step 600
600
#328466
oklch(55.5% 0.093 165.8)
-
Step 700
700 (this color)
#257156
oklch(49.4% 0.086 165.8)
-
Step 800
800
#205B46
oklch(42.6% 0.071 166.4)
-
Step 900
900
#214B3B
oklch(37.7% 0.055 166.2)
-
Step 950
950
#142C22
oklch(27% 0.036 165)
#257156 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) | #6F6955 | 0.087 |
| Deuteranopia (no green cones) | #646158 | 0.084 |
| Tritanopia (no blue cones) | #007169 | 0.031 |
| Achromatopsia (no color) | #646464 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257156
#257156
oklch(49.4% 0.086 165.8)
- #844D6C
#844D6C
oklch(49.4% 0.085 345.8)
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 #257156, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.041
- Deep Turquoise #017374 ΔE 0.045
- Dark Green Blue #1F6357 ΔE 0.047
- Dark Aqua #05696B ΔE 0.050
- Bluegreen #017A79 ΔE 0.052
- Dark Olive Green #556B2F ΔE 0.060
- Deep Aqua #08787F ΔE 0.061
- Dark Moss Green #606C38 ΔE 0.066
Use #257156 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.