#155D40
Closest named color: Spruce (#0A5F38). oklch(42.7% 0.085 161.6), rgb(21, 93, 64).
Aa
White text reads best on this color (7.86:1).
About this color
#155D40 is a dark, moderately saturated green. In OKLCH its lightness is 43%, its chroma 0.085 and its hue 162°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Spruce (#0A5F38), ΔE 0.017 away. White text reads best on it, at 7.86:1.
| Hue family | Greens |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.085) |
| Temperature | in between |
| Nearest name | Spruce (#0A5F38) |
| Black text | 2.67:1 |
| White text | 7.86:1 |
Values
| HEX | #155D40 |
| RGB | rgb(21, 93, 64) |
| HSL | hsl(156, 63%, 22%) |
| OKLCH | oklch(42.7% 0.085 161.6) |
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 #155D40 | 7.86:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #155D40 | 2.67:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #155D40 text on white | 7.86:1 | AAA | Lc 86.9 | Fine for body text |
| #155D40 text on black | 2.67:1 | Fails | Lc -15.2 | 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 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
#CADFD3
oklch(88.5% 0.028 160.8)
-
Step 300
300
#A5CBB7
oklch(80.9% 0.049 162.1)
-
Step 400
400
#72B091
oklch(70.6% 0.079 161.7)
-
Step 500
500
#499C76
oklch(63% 0.1 161.7)
-
Step 600
600
#23875F
oklch(55.7% 0.11 161.8)
-
Step 700
700
#13724E
oklch(49.1% 0.102 161.6)
-
Step 800
800 (this color)
#155D40
oklch(42.7% 0.085 161.6)
-
Step 900
900
#1A4C36
oklch(37.6% 0.066 161.5)
-
Step 950
950
#112D20
oklch(27.1% 0.042 161.5)
#155D40 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) | #5C563E | 0.081 |
| Deuteranopia (no green cones) | #524F42 | 0.078 |
| Tritanopia (no blue cones) | #005D55 | 0.034 |
| Achromatopsia (no color) | #525252 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155D40
#155D40
oklch(42.7% 0.085 161.6)
- #6E3B5C
#6E3B5C
oklch(42.7% 0.085 341.9)
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 #155D40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Spruce #0A5F38 ΔE 0.017
- Pine #2B5D34 ΔE 0.021
- Dark Green Blue #1F6357 ΔE 0.038
- Dark Blue Green #005249 ΔE 0.046
- Deep Teal #00555A ΔE 0.058
- Navy Green #35530A ΔE 0.058
- Deep Green #02590F ΔE 0.060
- Dark Slate Gray #2F4F4F ΔE 0.062
Use #155D40 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.