#256159
Closest named color: Dark Green Blue (#1F6357). oklch(45.1% 0.063 183.3), rgb(37, 97, 89).
Aa
White text reads best on this color (7.16:1).
About this color
#256159 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.063 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.009 away. White text reads best on it, at 7.16:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.93:1 |
| White text | 7.16:1 |
Values
| HEX | #256159 |
| RGB | rgb(37, 97, 89) |
| HSL | hsl(172, 45%, 26%) |
| OKLCH | oklch(45.1% 0.063 183.3) |
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 #256159 | 7.16:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #256159 | 2.93:1 | Fails | Lc 19.4 | Dividers and decoration only |
| #256159 text on white | 7.16:1 | AAA | Lc 84.6 | Fine for body text |
| #256159 text on black | 2.93:1 | Fails | Lc -17.4 | 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 800.
-
Step 50
50
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CBDEDA
oklch(88.5% 0.021 181.8)
-
Step 300
300
#A7C9C3
oklch(80.9% 0.037 183.5)
-
Step 400
400
#76ADA4
oklch(70.7% 0.059 183.3)
-
Step 500
500
#4F998E
oklch(63.2% 0.076 183)
-
Step 600
600
#2E8378
oklch(55.6% 0.082 183.2)
-
Step 700
700
#1F6F65
oklch(49.2% 0.077 183.1)
-
Step 800
800 (this color)
#256159
oklch(45.1% 0.063 183.3)
-
Step 900
900
#1F4A44
oklch(37.7% 0.049 183.3)
-
Step 950
950
#132B28
oklch(26.8% 0.031 185.1)
#256159 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) | #5C5C59 | 0.066 |
| Deuteranopia (no green cones) | #53555A | 0.063 |
| Tritanopia (no blue cones) | #00635E | 0.016 |
| Achromatopsia (no color) | #585858 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256159
#256159
oklch(45.1% 0.063 183.3)
- #734652
#734652
oklch(45% 0.064 2.7)
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 #256159, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.009
- Dark Aqua #05696B ΔE 0.032
- Petrol #005F6A ΔE 0.034
- Deep Teal #00555A ΔE 0.047
- Pine #2B5D34 ΔE 0.054
- Dark Slate Gray #2F4F4F ΔE 0.055
- Spruce #0A5F38 ΔE 0.056
- Dark Aquamarine #017371 ΔE 0.057
Use #256159 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.