#155C6A
Closest named color: Petrol (#005F6A). oklch(43.9% 0.07 214.3), rgb(21, 92, 106).
Aa
White text reads best on this color (7.57:1).
About this color
#155C6A is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.070 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.011 away. White text reads best on it, at 7.57:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.77:1 |
| White text | 7.57:1 |
Values
| HEX | #155C6A |
| RGB | rgb(21, 92, 106) |
| HSL | hsl(190, 67%, 25%) |
| OKLCH | oklch(43.9% 0.07 214.3) |
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 #155C6A | 7.57:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #155C6A | 2.77:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #155C6A text on white | 7.57:1 | AAA | Lc 86.0 | Fine for body text |
| #155C6A text on black | 2.77:1 | Fails | Lc -16.0 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C9DDE2
oklch(88.4% 0.022 214.4)
-
Step 300
300
#A3C8D1
oklch(80.9% 0.041 214.2)
-
Step 400
400
#6FACBA
oklch(70.8% 0.066 213.8)
-
Step 500
500
#4496A9
oklch(63% 0.084 215.3)
-
Step 600
600
#1C8194
oklch(55.7% 0.091 213.9)
-
Step 700
700
#086D7E
oklch(49.2% 0.084 213.7)
-
Step 800
800 (this color)
#155C6A
oklch(43.9% 0.07 214.3)
-
Step 900
900
#184953
oklch(37.7% 0.054 213.6)
-
Step 950
950
#102B31
oklch(27.1% 0.034 214.3)
#155C6A 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) | #52596B | 0.063 |
| Deuteranopia (no green cones) | #46506A | 0.057 |
| Tritanopia (no blue cones) | #006160 | 0.028 |
| Achromatopsia (no color) | #545454 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155C6A
#155C6A
oklch(43.9% 0.07 214.3)
- #744438
#744438
oklch(44.1% 0.07 34.8)
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 #155C6A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.011
- Deep Teal #00555A ΔE 0.034
- Dark Aqua #05696B ΔE 0.041
- Dark Green Blue #1F6357 ΔE 0.045
- YInMn Blue #415A77 ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.054
- Light Navy Blue #2E5A88 ΔE 0.057
Use #155C6A 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.