#155A4E
Closest named color: Dark Blue Green (#005249). oklch(42.3% 0.069 178.4), rgb(21, 90, 78).
Aa
White text reads best on this color (8.06:1).
About this color
#155A4E is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.069 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Green (#005249), ΔE 0.029 away. White text reads best on it, at 8.06:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Dark Blue Green (#005249) |
| Black text | 2.60:1 |
| White text | 8.06:1 |
Values
| HEX | #155A4E |
| RGB | rgb(21, 90, 78) |
| HSL | hsl(170, 62%, 22%) |
| OKLCH | oklch(42.3% 0.069 178.4) |
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 #155A4E | 8.06:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #155A4E | 2.60:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #155A4E text on white | 8.06:1 | AAA | Lc 87.6 | Fine for body text |
| #155A4E text on black | 2.60:1 | Fails | Lc -14.5 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDEA
oklch(93.7% 0.012 178)
-
Step 200
200
#CADED9
oklch(88.4% 0.022 179.1)
-
Step 300
300
#A5CAC1
oklch(81% 0.041 178.8)
-
Step 400
400
#73AEA1
oklch(70.6% 0.064 178.9)
-
Step 500
500
#4A9A8A
oklch(63.1% 0.083 178.6)
-
Step 600
600
#268474
oklch(55.5% 0.089 179)
-
Step 700
700
#167061
oklch(49.1% 0.084 178.4)
-
Step 800
800 (this color)
#155A4E
oklch(42.3% 0.069 178.4)
-
Step 900
900
#1B4B42
oklch(37.7% 0.054 178.9)
-
Step 950
950
#122C27
oklch(27.1% 0.034 179.6)
#155A4E 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) | #56544E | 0.073 |
| Deuteranopia (no green cones) | #4D4D4F | 0.070 |
| Tritanopia (no blue cones) | #005C56 | 0.013 |
| Achromatopsia (no color) | #505050 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155A4E
#155A4E
oklch(42.3% 0.069 178.4)
- #6C3D4D
#6C3D4D
oklch(42.2% 0.069 358.6)
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 #155A4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Green #005249 ΔE 0.029
- Deep Teal #00555A ΔE 0.031
- Dark Green Blue #1F6357 ΔE 0.031
- Dark Slate Gray #2F4F4F ΔE 0.040
- Spruce #0A5F38 ΔE 0.044
- Petrol #005F6A ΔE 0.044
- Pine #2B5D34 ΔE 0.045
- Dark Teal #014D4E ΔE 0.047
Use #155A4E 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.