#155A40
Closest named color: Spruce (#0A5F38). oklch(41.8% 0.08 163.3), rgb(21, 90, 64).
Aa
White text reads best on this color (8.17:1).
About this color
#155A40 is a dark, moderately saturated green. In OKLCH its lightness is 42%, its chroma 0.080 and its hue 163°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Spruce (#0A5F38), ΔE 0.024 away. White text reads best on it, at 8.17:1.
| Hue family | Greens |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.080) |
| Temperature | in between |
| Nearest name | Spruce (#0A5F38) |
| Black text | 2.56:1 |
| White text | 8.17:1 |
Values
| HEX | #155A40 |
| RGB | rgb(21, 90, 64) |
| HSL | hsl(157, 62%, 22%) |
| OKLCH | oklch(41.8% 0.08 163.3) |
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 #155A40 | 8.17:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #155A40 | 2.56:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #155A40 text on white | 8.17:1 | AAA | Lc 88.0 | Fine for body text |
| #155A40 text on black | 2.56:1 | Fails | Lc -14.2 | Not readable |
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
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E2EDE7
oklch(93.6% 0.014 162.5)
-
Step 200
200
#CADFD4
oklch(88.5% 0.027 163.1)
-
Step 300
300
#A6CBB8
oklch(81% 0.048 162.8)
-
Step 400
400
#74B093
oklch(70.8% 0.076 162.7)
-
Step 500
500
#4B9C79
oklch(63.2% 0.097 163.2)
-
Step 600
600
#288662
oklch(55.6% 0.104 163.4)
-
Step 700
700
#187251
oklch(49.2% 0.098 163.2)
-
Step 800
800 (this color)
#155A40
oklch(41.8% 0.08 163.3)
-
Step 900
900
#1C4C38
oklch(37.7% 0.063 163.2)
-
Step 950
950
#122D21
oklch(27.2% 0.04 162.8)
#155A40 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) | #58533F | 0.078 |
| Deuteranopia (no green cones) | #4F4D42 | 0.074 |
| Tritanopia (no blue cones) | #005A53 | 0.031 |
| Achromatopsia (no color) | #4F4F4F | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155A40
#155A40
oklch(41.8% 0.08 163.3)
- #6A3A58
#6A3A58
oklch(41.8% 0.079 342.9)
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 #155A40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Spruce #0A5F38 ΔE 0.024
- Pine #2B5D34 ΔE 0.027
- Dark Blue Green #005249 ΔE 0.036
- Dark Green Blue #1F6357 ΔE 0.042
- Deep Teal #00555A ΔE 0.051
- Dark Slate Gray #2F4F4F ΔE 0.055
- Dark Teal #014D4E ΔE 0.057
- Navy Green #35530A ΔE 0.058
Use #155A40 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.