#155A52
Closest named color: Deep Teal (#00555A). oklch(42.4% 0.067 183.7), rgb(21, 90, 82).
Aa
White text reads best on this color (8.02:1).
About this color
#155A52 is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.067 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.026 away. White text reads best on it, at 8.02:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.61:1 |
| White text | 8.02:1 |
Values
| HEX | #155A52 |
| RGB | rgb(21, 90, 82) |
| HSL | hsl(173, 62%, 22%) |
| OKLCH | oklch(42.4% 0.067 183.7) |
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 #155A52 | 8.02:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #155A52 | 2.61:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #155A52 text on white | 8.02:1 | AAA | Lc 87.5 | Fine for body text |
| #155A52 text on black | 2.61:1 | Fails | Lc -14.6 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEA
oklch(93.5% 0.011 182.9)
-
Step 200
200
#CADEDA
oklch(88.5% 0.022 182.5)
-
Step 300
300
#A5C9C3
oklch(80.8% 0.039 184.1)
-
Step 400
400
#73AEA5
oklch(70.8% 0.063 183.9)
-
Step 500
500
#49998F
oklch(63% 0.08 184.6)
-
Step 600
600
#258479
oklch(55.7% 0.088 183.8)
-
Step 700
700
#156F66
oklch(49% 0.081 184.6)
-
Step 800
800 (this color)
#155A52
oklch(42.4% 0.067 183.7)
-
Step 900
900
#1B4B44
oklch(37.8% 0.053 182.3)
-
Step 950
950
#112C28
oklch(27% 0.034 182.9)
#155A52 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) | #555452 | 0.072 |
| Deuteranopia (no green cones) | #4C4D53 | 0.069 |
| Tritanopia (no blue cones) | #005C57 | 0.010 |
| Achromatopsia (no color) | #505050 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155A52
#155A52
oklch(42.4% 0.067 183.7)
- #6D3E4A
#6D3E4A
oklch(42.4% 0.067 3.9)
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 #155A52, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.026
- Dark Blue Green #005249 ΔE 0.031
- Dark Green Blue #1F6357 ΔE 0.031
- Dark Slate Gray #2F4F4F ΔE 0.038
- Petrol #005F6A ΔE 0.038
- Dark Teal #014D4E ΔE 0.045
- Spruce #0A5F38 ΔE 0.050
- Pine #2B5D34 ΔE 0.051
Use #155A52 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.