#155C4D
Closest named color: Dark Green Blue (#1F6357). oklch(42.8% 0.072 175.1), rgb(21, 92, 77).
Aa
White text reads best on this color (7.86:1).
About this color
#155C4D is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 43%, its chroma 0.072 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.026 away. White text reads best on it, at 7.86:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.66:1 |
| White text | 7.86:1 |
Values
| HEX | #155C4D |
| RGB | rgb(21, 92, 77) |
| HSL | hsl(167, 63%, 22%) |
| OKLCH | oklch(42.8% 0.072 175.1) |
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 #155C4D | 7.86:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #155C4D | 2.66:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #155C4D text on white | 7.86:1 | AAA | Lc 87.0 | Fine for body text |
| #155C4D text on black | 2.66:1 | Fails | Lc -15.1 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE9
oklch(93.7% 0.013 172.4)
-
Step 200
200
#CADED8
oklch(88.4% 0.023 175.9)
-
Step 300
300
#A5CABF
oklch(80.9% 0.042 175.2)
-
Step 400
400
#72AF9E
oklch(70.7% 0.068 174.8)
-
Step 500
500
#489B87
oklch(63.2% 0.087 175.4)
-
Step 600
600
#238570
oklch(55.6% 0.094 174.9)
-
Step 700
700
#12715E
oklch(49.2% 0.088 174.9)
-
Step 800
800 (this color)
#155C4D
oklch(42.8% 0.072 175.1)
-
Step 900
900
#1A4B40
oklch(37.6% 0.056 175.8)
-
Step 950
950
#112C25
oklch(26.9% 0.036 174.4)
#155C4D 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) | #58564C | 0.075 |
| Deuteranopia (no green cones) | #4F4F4E | 0.072 |
| Tritanopia (no blue cones) | #005D58 | 0.018 |
| Achromatopsia (no color) | #525252 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155C4D
#155C4D
oklch(42.8% 0.072 175.1)
- #6E3E51
#6E3E51
oklch(42.8% 0.072 355.3)
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 #155C4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.026
- Dark Blue Green #005249 ΔE 0.036
- Deep Teal #00555A ΔE 0.038
- Spruce #0A5F38 ΔE 0.038
- Pine #2B5D34 ΔE 0.040
- Petrol #005F6A ΔE 0.046
- Dark Slate Gray #2F4F4F ΔE 0.047
- Dark Teal #014D4E ΔE 0.054
Use #155C4D 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.