#155E67
Closest named color: Petrol (#005F6A). oklch(44.3% 0.069 207.4), rgb(21, 94, 103).
Aa
White text reads best on this color (7.42:1).
About this color
#155E67 is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.069 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.008 away. White text reads best on it, at 7.42:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.82:1 |
| White text | 7.42:1 |
Values
| HEX | #155E67 |
| RGB | rgb(21, 94, 103) |
| HSL | hsl(187, 66%, 24%) |
| OKLCH | oklch(44.3% 0.069 207.4) |
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 #155E67 | 7.42:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #155E67 | 2.82:1 | Fails | Lc 18.6 | Dividers and decoration only |
| #155E67 text on white | 7.42:1 | AAA | Lc 85.5 | Fine for body text |
| #155E67 text on black | 2.82:1 | Fails | Lc -16.6 | 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
#F1F6F7
oklch(97% 0.005 211)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C9DEE1
oklch(88.6% 0.023 207.1)
-
Step 300
300
#A3C8CE
oklch(80.8% 0.04 208.4)
-
Step 400
400
#6FACB5
oklch(70.6% 0.064 207.6)
-
Step 500
500
#4398A3
oklch(63.2% 0.083 206.8)
-
Step 600
600
#19828E
oklch(55.7% 0.09 206.9)
-
Step 700
700
#046E79
oklch(49.2% 0.083 207)
-
Step 800
800 (this color)
#155E67
oklch(44.3% 0.069 207.4)
-
Step 900
900
#174A50
oklch(37.8% 0.054 206.1)
-
Step 950
950
#0F2B2F
oklch(26.9% 0.034 207.9)
#155E67 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) | #555A68 | 0.067 |
| Deuteranopia (no green cones) | #4A5267 | 0.061 |
| Tritanopia (no blue cones) | #006361 | 0.022 |
| Achromatopsia (no color) | #555555 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155E67
#155E67
oklch(44.3% 0.069 207.4)
- #75443E
#75443E
oklch(44.3% 0.069 27.6)
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 #155E67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.008
- Dark Aqua #05696B ΔE 0.034
- Deep Teal #00555A ΔE 0.035
- Dark Green Blue #1F6357 ΔE 0.036
- Dark Slate Gray #2F4F4F ΔE 0.052
- YInMn Blue #415A77 ΔE 0.052
- Dark Blue Green #005249 ΔE 0.058
- Deep Sea Blue #015482 ΔE 0.063
Use #155E67 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.