#155C4E
Closest named color: Dark Green Blue (#1F6357). oklch(42.8% 0.072 176.3), rgb(21, 92, 78).
Aa
White text reads best on this color (7.85:1).
About this color
#155C4E is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 43%, its chroma 0.072 and its hue 176°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.026 away. White text reads best on it, at 7.85:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.67:1 |
| White text | 7.85:1 |
Values
| HEX | #155C4E |
| RGB | rgb(21, 92, 78) |
| HSL | hsl(168, 63%, 22%) |
| OKLCH | oklch(42.8% 0.072 176.3) |
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 #155C4E | 7.85:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #155C4E | 2.67:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #155C4E text on white | 7.85:1 | AAA | Lc 87.0 | Fine for body text |
| #155C4E text on black | 2.67:1 | Fails | Lc -15.1 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE9
oklch(93.7% 0.013 172.4)
-
Step 200
200
#CADED8
oklch(88.4% 0.023 175.9)
-
Step 300
300
#A5CAC0
oklch(80.9% 0.042 177)
-
Step 400
400
#72AF9F
oklch(70.8% 0.068 175.9)
-
Step 500
500
#489B88
oklch(63.2% 0.086 176.2)
-
Step 600
600
#228572
oklch(55.6% 0.093 176.7)
-
Step 700
700
#12705F
oklch(49% 0.086 176.6)
-
Step 800
800 (this color)
#155C4E
oklch(42.8% 0.072 176.3)
-
Step 900
900
#1A4B41
oklch(37.6% 0.055 177.4)
-
Step 950
950
#112C26
oklch(27% 0.035 177.1)
#155C4E 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) | #58564D | 0.075 |
| Deuteranopia (no green cones) | #4F4F4F | 0.072 |
| Tritanopia (no blue cones) | #005D58 | 0.016 |
| Achromatopsia (no color) | #525252 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155C4E
#155C4E
oklch(42.8% 0.072 176.3)
- #6E3E50
#6E3E50
oklch(42.8% 0.071 356.6)
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 #155C4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.026
- Dark Blue Green #005249 ΔE 0.035
- Deep Teal #00555A ΔE 0.037
- Spruce #0A5F38 ΔE 0.040
- Pine #2B5D34 ΔE 0.041
- Petrol #005F6A ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.046
- Dark Aqua #05696B ΔE 0.053
Use #155C4E 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.