#155E60
Closest named color: Petrol (#005F6A). oklch(44.1% 0.068 197.7), rgb(21, 94, 96).
Aa
White text reads best on this color (7.49:1).
About this color
#155E60 is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.068 and its hue 198°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.016 away. White text reads best on it, at 7.49:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.80:1 |
| White text | 7.49:1 |
Values
| HEX | #155E60 |
| RGB | rgb(21, 94, 96) |
| HSL | hsl(182, 64%, 23%) |
| OKLCH | oklch(44.1% 0.068 197.7) |
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 #155E60 | 7.49:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #155E60 | 2.80:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #155E60 text on white | 7.49:1 | AAA | Lc 85.7 | Fine for body text |
| #155E60 text on black | 2.80:1 | Fails | Lc -16.3 | 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
#F2F7F7
oklch(97.2% 0.005 197.1)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#C9DEDE
oklch(88.5% 0.022 196.8)
-
Step 300
300
#A4C9CA
oklch(80.9% 0.039 198.4)
-
Step 400
400
#70ADAF
oklch(70.7% 0.063 198.5)
-
Step 500
500
#44999B
oklch(63.2% 0.082 197.4)
-
Step 600
600
#1B8386
oklch(55.7% 0.088 197.9)
-
Step 700
700
#066F71
oklch(49.2% 0.082 197)
-
Step 800
800 (this color)
#155E60
oklch(44.1% 0.068 197.7)
-
Step 900
900
#174A4C
oklch(37.7% 0.053 198.8)
-
Step 950
950
#102B2C
oklch(26.9% 0.033 198.6)
#155E60 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) | #575960 | 0.070 |
| Deuteranopia (no green cones) | #4C5160 | 0.065 |
| Tritanopia (no blue cones) | #00625E | 0.015 |
| Achromatopsia (no color) | #555555 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155E60
#155E60
oklch(44.1% 0.068 197.7)
- #744345
#744345
oklch(44.2% 0.068 17.6)
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 #155E60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.016
- Dark Green Blue #1F6357 ΔE 0.026
- Deep Teal #00555A ΔE 0.032
- Dark Aqua #05696B ΔE 0.034
- Dark Slate Gray #2F4F4F ΔE 0.048
- Dark Blue Green #005249 ΔE 0.051
- Dark Teal #014D4E ΔE 0.060
- YInMn Blue #415A77 ΔE 0.061
Use #155E60 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.