#155D5C
Closest named color: Petrol (#005F6A). oklch(43.6% 0.067 193.6), rgb(21, 93, 92).
Aa
White text reads best on this color (7.63:1).
About this color
#155D5C is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.067 and its hue 194°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.022 away. White text reads best on it, at 7.63:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.75:1 |
| White text | 7.63:1 |
Values
| HEX | #155D5C |
| RGB | rgb(21, 93, 92) |
| HSL | hsl(179, 63%, 22%) |
| OKLCH | oklch(43.6% 0.067 193.6) |
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 #155D5C | 7.63:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #155D5C | 2.75:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #155D5C text on white | 7.63:1 | AAA | Lc 86.2 | Fine for body text |
| #155D5C text on black | 2.75:1 | Fails | Lc -15.9 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#C9DEDD
oklch(88.5% 0.022 193.3)
-
Step 300
300
#A4C9C8
oklch(80.9% 0.039 194.4)
-
Step 400
400
#70ADAC
oklch(70.6% 0.063 194.5)
-
Step 500
500
#469997
oklch(63.1% 0.08 193.2)
-
Step 600
600
#1E8382
oklch(55.6% 0.087 193.9)
-
Step 700
700
#0B6F6E
oklch(49.1% 0.081 193.7)
-
Step 800
800 (this color)
#155D5C
oklch(43.6% 0.067 193.6)
-
Step 900
900
#184A49
oklch(37.6% 0.053 193.3)
-
Step 950
950
#102C2B
oklch(27.1% 0.034 192.2)
#155D5C 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) | #57585C | 0.071 |
| Deuteranopia (no green cones) | #4C505D | 0.067 |
| Tritanopia (no blue cones) | #00605C | 0.011 |
| Achromatopsia (no color) | #545454 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155D5C
#155D5C
oklch(43.6% 0.067 193.6)
- #724146
#724146
oklch(43.6% 0.068 13.7)
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 #155D5C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.022
- Dark Green Blue #1F6357 ΔE 0.025
- Deep Teal #00555A ΔE 0.029
- Dark Aqua #05696B ΔE 0.039
- Dark Slate Gray #2F4F4F ΔE 0.045
- Dark Blue Green #005249 ΔE 0.045
- Dark Teal #014D4E ΔE 0.055
- Spruce #0A5F38 ΔE 0.061
Use #155D5C 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.