#155E65
Closest named color: Petrol (#005F6A). oklch(44.3% 0.069 204.6), rgb(21, 94, 101).
Aa
White text reads best on this color (7.44:1).
About this color
#155E65 is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.069 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.009 away. White text reads best on it, at 7.44:1.
| 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 | 7.44:1 |
Values
| HEX | #155E65 |
| RGB | rgb(21, 94, 101) |
| HSL | hsl(185, 66%, 24%) |
| OKLCH | oklch(44.3% 0.069 204.6) |
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 #155E65 | 7.44:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #155E65 | 2.82:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #155E65 text on white | 7.44:1 | AAA | Lc 85.5 | Fine for body text |
| #155E65 text on black | 2.82:1 | Fails | Lc -16.5 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E1ECED
oklch(93.5% 0.012 203.5)
-
Step 200
200
#C9DEE0
oklch(88.6% 0.023 203.7)
-
Step 300
300
#A3C9CD
oklch(81% 0.041 204.3)
-
Step 400
400
#6FADB3
oklch(70.8% 0.064 203.6)
-
Step 500
500
#4398A1
oklch(63.1% 0.082 204.7)
-
Step 600
600
#19828C
oklch(55.6% 0.089 205)
-
Step 700
700
#046E77
oklch(49.1% 0.083 204.8)
-
Step 800
800 (this color)
#155E65
oklch(44.3% 0.069 204.6)
-
Step 900
900
#174A4F
oklch(37.8% 0.054 204.3)
-
Step 950
950
#0F2B2E
oklch(26.9% 0.034 204.8)
#155E65 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) | #565A65 | 0.068 |
| Deuteranopia (no green cones) | #4B5265 | 0.062 |
| Tritanopia (no blue cones) | #006260 | 0.019 |
| Achromatopsia (no color) | #555555 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155E65
#155E65
oklch(44.3% 0.069 204.6)
- #754440
#754440
oklch(44.4% 0.069 25.2)
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 #155E65, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.009
- Dark Green Blue #1F6357 ΔE 0.033
- Dark Aqua #05696B ΔE 0.034
- Deep Teal #00555A ΔE 0.034
- Dark Slate Gray #2F4F4F ΔE 0.051
- YInMn Blue #415A77 ΔE 0.055
- Dark Blue Green #005249 ΔE 0.056
- Dark Teal #014D4E ΔE 0.062
Use #155E65 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.