#155151
Closest named color: Deep Teal (#00555A). oklch(39.8% 0.059 195), rgb(21, 81, 81).
Aa
White text reads best on this color (9.02:1).
About this color
#155151 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.059 and its hue 195°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.017 away. White text reads best on it, at 9.02:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.32:1 |
| White text | 9.02:1 |
Values
| HEX | #155151 |
| RGB | rgb(21, 81, 81) |
| HSL | hsl(180, 59%, 20%) |
| OKLCH | oklch(39.8% 0.059 195) |
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 #155151 | 9.02:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #155151 | 2.32:1 | Fails | Lc 13.5 | Not readable |
| #155151 text on white | 9.02:1 | AAA | Lc 90.5 | Preferred for body text |
| #155151 text on black | 2.32:1 | Fails | Lc -11.8 | Not readable |
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 900.
-
Step 50
50
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1EDEC
oklch(93.7% 0.013 190.9)
-
Step 200
200
#C7DFDE
oklch(88.6% 0.026 193.6)
-
Step 300
300
#A0CAC9
oklch(80.9% 0.044 194.5)
-
Step 400
400
#68AFAE
oklch(70.7% 0.072 194.5)
-
Step 500
500
#369B9A
oklch(63.2% 0.091 194.2)
-
Step 600
600
#008484
oklch(55.5% 0.095 194.8)
-
Step 700
700
#006F6F
oklch(49% 0.084 194.8)
-
Step 800
800
#005B5B
oklch(42.7% 0.073 194.8)
-
Step 900
900 (this color)
#155151
oklch(39.8% 0.059 195)
-
Step 950
950
#0B2C2C
oklch(26.9% 0.038 195.2)
#155151 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) | #4B4D51 | 0.061 |
| Deuteranopia (no green cones) | #424651 | 0.057 |
| Tritanopia (no blue cones) | #005451 | 0.012 |
| Achromatopsia (no color) | #494949 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155151
#155151
oklch(39.8% 0.059 195)
- #63393D
#63393D
oklch(39.7% 0.06 14)
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 #155151, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.017
- Dark Teal #014D4E ΔE 0.018
- Dark Blue Green #005249 ΔE 0.019
- Dark Slate Gray #2F4F4F ΔE 0.022
- Charcoal #264653 ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.047
- Petrol #005F6A ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.059
Use #155151 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.