#155B69
Closest named color: Petrol (#005F6A). oklch(43.6% 0.069 214.5), rgb(21, 91, 105).
Aa
White text reads best on this color (7.68:1).
About this color
#155B69 is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.069 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.013 away. White text reads best on it, at 7.68:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.73:1 |
| White text | 7.68:1 |
Values
| HEX | #155B69 |
| RGB | rgb(21, 91, 105) |
| HSL | hsl(190, 67%, 25%) |
| OKLCH | oklch(43.6% 0.069 214.5) |
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 #155B69 | 7.68:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #155B69 | 2.73:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #155B69 text on white | 7.68:1 | AAA | Lc 86.4 | Fine for body text |
| #155B69 text on black | 2.73:1 | Fails | Lc -15.7 | 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
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#C9DDE2
oklch(88.4% 0.022 214.4)
-
Step 300
300
#A4C8D1
oklch(81% 0.04 214.6)
-
Step 400
400
#70ABBA
oklch(70.6% 0.065 215.5)
-
Step 500
500
#4596A8
oklch(63% 0.083 214.4)
-
Step 600
600
#1E8094
oklch(55.5% 0.09 215.2)
-
Step 700
700
#0B6C7E
oklch(49% 0.084 215)
-
Step 800
800 (this color)
#155B69
oklch(43.6% 0.069 214.5)
-
Step 900
900
#184953
oklch(37.7% 0.054 213.6)
-
Step 950
950
#102B31
oklch(27.1% 0.034 214.3)
#155B69 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) | #51586A | 0.062 |
| Deuteranopia (no green cones) | #464F69 | 0.057 |
| Tritanopia (no blue cones) | #00605F | 0.028 |
| Achromatopsia (no color) | #535353 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155B69
#155B69
oklch(43.6% 0.069 214.5)
- #734337
#734337
oklch(43.7% 0.07 34.9)
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 #155B69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.013
- Deep Teal #00555A ΔE 0.031
- Dark Aqua #05696B ΔE 0.044
- Dark Green Blue #1F6357 ΔE 0.046
- Dark Slate Gray #2F4F4F ΔE 0.049
- YInMn Blue #415A77 ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.053
- Dark Blue Green #005249 ΔE 0.058
Use #155B69 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.