#155B48
Closest named color: Spruce (#0A5F38). oklch(42.3% 0.075 170.4), rgb(21, 91, 72).
Aa
White text reads best on this color (8.00:1).
About this color
#155B48 is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 42%, its chroma 0.075 and its hue 170°. Its hue sits on the cool side of the wheel. The nearest named color is Spruce (#0A5F38), ΔE 0.032 away. White text reads best on it, at 8.00:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Spruce (#0A5F38) |
| Black text | 2.62:1 |
| White text | 8.00:1 |
Values
| HEX | #155B48 |
| RGB | rgb(21, 91, 72) |
| HSL | hsl(164, 63%, 22%) |
| OKLCH | oklch(42.3% 0.075 170.4) |
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 #155B48 | 8.00:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #155B48 | 2.62:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #155B48 text on white | 8.00:1 | AAA | Lc 87.4 | Fine for body text |
| #155B48 text on black | 2.62:1 | Fails | Lc -14.7 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE8
oklch(93.6% 0.013 167.2)
-
Step 200
200
#CADFD7
oklch(88.6% 0.025 170.9)
-
Step 300
300
#A5CABC
oklch(80.8% 0.044 170.2)
-
Step 400
400
#73AF9A
oklch(70.7% 0.07 170.2)
-
Step 500
500
#4A9B82
oklch(63.1% 0.089 170.7)
-
Step 600
600
#25856B
oklch(55.5% 0.097 170.7)
-
Step 700
700
#157159
oklch(49.1% 0.091 170.2)
-
Step 800
800 (this color)
#155B48
oklch(42.3% 0.075 170.4)
-
Step 900
900
#1B4C3D
oklch(37.8% 0.059 169.9)
-
Step 950
950
#112C24
oklch(26.9% 0.037 171.8)
#155B48 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) | #585447 | 0.076 |
| Deuteranopia (no green cones) | #4F4E49 | 0.073 |
| Tritanopia (no blue cones) | #005C56 | 0.022 |
| Achromatopsia (no color) | #505050 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155B48
#155B48
oklch(42.3% 0.075 170.4)
- #6C3C53
#6C3C53
oklch(42.3% 0.074 350.6)
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 #155B48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Spruce #0A5F38 ΔE 0.032
- Dark Green Blue #1F6357 ΔE 0.033
- Dark Blue Green #005249 ΔE 0.034
- Pine #2B5D34 ΔE 0.034
- Deep Teal #00555A ΔE 0.042
- Dark Slate Gray #2F4F4F ΔE 0.048
- Petrol #005F6A ΔE 0.054
- Dark Teal #014D4E ΔE 0.054
Use #155B48 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.