#155357
Closest named color: Deep Teal (#00555A). oklch(40.6% 0.061 201.4), rgb(21, 83, 87).
Aa
White text reads best on this color (8.72:1).
About this color
#155357 is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.061 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.009 away. White text reads best on it, at 8.72:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.40:1 |
| White text | 8.72:1 |
Values
| HEX | #155357 |
| RGB | rgb(21, 83, 87) |
| HSL | hsl(184, 61%, 21%) |
| OKLCH | oklch(40.6% 0.061 201.4) |
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 #155357 | 8.72:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #155357 | 2.40:1 | Fails | Lc 14.4 | Not readable |
| #155357 text on white | 8.72:1 | AAA | Lc 89.6 | Fine for body text |
| #155357 text on black | 2.40:1 | Fails | Lc -12.6 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CBDDDE
oklch(88.4% 0.019 200.8)
-
Step 300
300
#A7C8CA
oklch(80.9% 0.035 201)
-
Step 400
400
#76ACAF
oklch(70.8% 0.057 200.3)
-
Step 500
500
#4F979C
oklch(63.2% 0.072 201.4)
-
Step 600
600
#2D8187
oklch(55.6% 0.079 201.9)
-
Step 700
700
#1F6D72
oklch(49.1% 0.073 201.3)
-
Step 800
800 (this color)
#155357
oklch(40.6% 0.061 201.4)
-
Step 900
900
#1E494C
oklch(37.6% 0.048 201.5)
-
Step 950
950
#132B2D
oklch(27.1% 0.03 202.6)
#155357 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) | #4C4F57 | 0.061 |
| Deuteranopia (no green cones) | #434857 | 0.057 |
| Tritanopia (no blue cones) | #005654 | 0.015 |
| Achromatopsia (no color) | #4B4B4B | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155357
#155357
oklch(40.6% 0.061 201.4)
- #663C3B
#663C3B
oklch(40.6% 0.06 21.5)
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 #155357, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.009
- Dark Slate Gray #2F4F4F ΔE 0.024
- Dark Teal #014D4E ΔE 0.026
- Dark Blue Green #005249 ΔE 0.027
- Charcoal #264653 ΔE 0.042
- Petrol #005F6A ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.047
- Dark Green Blue #1F6357 ΔE 0.055
Use #155357 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.