#155B4C
Closest named color: Dark Green Blue (#1F6357). oklch(42.5% 0.072 174.9), rgb(21, 91, 76).
Aa
White text reads best on this color (7.97:1).
About this color
#155B4C is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 42%, its chroma 0.072 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.030 away. White text reads best on it, at 7.97:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.63:1 |
| White text | 7.97:1 |
Values
| HEX | #155B4C |
| RGB | rgb(21, 91, 76) |
| HSL | hsl(167, 63%, 22%) |
| OKLCH | oklch(42.5% 0.072 174.9) |
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 #155B4C | 7.97:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #155B4C | 2.63:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #155B4C text on white | 7.97:1 | AAA | Lc 87.3 | Fine for body text |
| #155B4C text on black | 2.63:1 | Fails | Lc -14.8 | 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
#E2EDE9
oklch(93.7% 0.013 172.4)
-
Step 200
200
#CADED8
oklch(88.4% 0.023 175.9)
-
Step 300
300
#A5CABF
oklch(80.9% 0.042 175.2)
-
Step 400
400
#73AF9E
oklch(70.8% 0.067 174.5)
-
Step 500
500
#499B86
oklch(63.2% 0.087 174.3)
-
Step 600
600
#248570
oklch(55.6% 0.094 174.9)
-
Step 700
700
#14705E
oklch(49% 0.086 175.5)
-
Step 800
800 (this color)
#155B4C
oklch(42.5% 0.072 174.9)
-
Step 900
900
#1B4B40
oklch(37.6% 0.055 175.6)
-
Step 950
950
#112C25
oklch(26.9% 0.036 174.4)
#155B4C 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) | #58554B | 0.075 |
| Deuteranopia (no green cones) | #4E4E4D | 0.071 |
| Tritanopia (no blue cones) | #005C57 | 0.018 |
| Achromatopsia (no color) | #515151 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155B4C
#155B4C
oklch(42.5% 0.072 174.9)
- #6D3D50
#6D3D50
oklch(42.5% 0.072 355.4)
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 #155B4C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.030
- Dark Blue Green #005249 ΔE 0.032
- Deep Teal #00555A ΔE 0.036
- Spruce #0A5F38 ΔE 0.039
- Pine #2B5D34 ΔE 0.040
- Dark Slate Gray #2F4F4F ΔE 0.045
- Petrol #005F6A ΔE 0.047
- Dark Teal #014D4E ΔE 0.051
Use #155B4C 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.