#155751
Closest named color: Deep Teal (#00555A). oklch(41.5% 0.065 186.1), rgb(21, 87, 81).
Aa
White text reads best on this color (8.35:1).
About this color
#155751 is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.065 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.020 away. White text reads best on it, at 8.35:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.51:1 |
| White text | 8.35:1 |
Values
| HEX | #155751 |
| RGB | rgb(21, 87, 81) |
| HSL | hsl(175, 61%, 21%) |
| OKLCH | oklch(41.5% 0.065 186.1) |
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 #155751 | 8.35:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #155751 | 2.51:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #155751 text on white | 8.35:1 | AAA | Lc 88.5 | Fine for body text |
| #155751 text on black | 2.51:1 | Fails | Lc -13.7 | 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 800.
-
Step 50
50
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CBDEDB
oklch(88.6% 0.021 185.4)
-
Step 300
300
#A6C9C4
oklch(80.9% 0.038 185.9)
-
Step 400
400
#74ADA6
oklch(70.6% 0.061 186.2)
-
Step 500
500
#4C9990
oklch(63.1% 0.078 185.4)
-
Step 600
600
#29837B
oklch(55.6% 0.084 186.6)
-
Step 700
700
#1A6F67
oklch(49.1% 0.078 185.6)
-
Step 800
800 (this color)
#155751
oklch(41.5% 0.065 186.1)
-
Step 900
900
#1D4A46
oklch(37.6% 0.05 187.4)
-
Step 950
950
#122C29
oklch(27.1% 0.033 185.7)
#155751 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) | #525251 | 0.068 |
| Deuteranopia (no green cones) | #494B52 | 0.065 |
| Tritanopia (no blue cones) | #005955 | 0.009 |
| Achromatopsia (no color) | #4E4E4E | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155751
#155751
oklch(41.5% 0.065 186.1)
- #693C46
#693C46
oklch(41.4% 0.064 5.9)
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 #155751, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.020
- Dark Blue Green #005249 ΔE 0.023
- Dark Slate Gray #2F4F4F ΔE 0.031
- Dark Teal #014D4E ΔE 0.036
- Dark Green Blue #1F6357 ΔE 0.040
- Petrol #005F6A ΔE 0.042
- Spruce #0A5F38 ΔE 0.055
- Pine #2B5D34 ΔE 0.056
Use #155751 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.