#155A4D
Closest named color: Dark Blue Green (#005249). oklch(42.2% 0.07 177.2), rgb(21, 90, 77).
Aa
White text reads best on this color (8.07:1).
About this color
#155A4D is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.070 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Green (#005249), ΔE 0.029 away. White text reads best on it, at 8.07:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Dark Blue Green (#005249) |
| Black text | 2.60:1 |
| White text | 8.07:1 |
Values
| HEX | #155A4D |
| RGB | rgb(21, 90, 77) |
| HSL | hsl(169, 62%, 22%) |
| OKLCH | oklch(42.2% 0.07 177.2) |
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 #155A4D | 8.07:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #155A4D | 2.60:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #155A4D text on white | 8.07:1 | AAA | Lc 87.6 | Fine for body text |
| #155A4D text on black | 2.60:1 | Fails | Lc -14.5 | 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
#E2EDEA
oklch(93.7% 0.012 178)
-
Step 200
200
#CADED9
oklch(88.4% 0.022 179.1)
-
Step 300
300
#A6CAC0
oklch(81% 0.041 176.5)
-
Step 400
400
#73AEA0
oklch(70.6% 0.065 177.7)
-
Step 500
500
#4A9A89
oklch(63.1% 0.083 177.7)
-
Step 600
600
#268572
oklch(55.7% 0.092 176.4)
-
Step 700
700
#167060
oklch(49.1% 0.084 177.4)
-
Step 800
800 (this color)
#155A4D
oklch(42.2% 0.07 177.2)
-
Step 900
900
#1B4B41
oklch(37.7% 0.055 177.2)
-
Step 950
950
#122C26
oklch(27% 0.034 176.7)
#155A4D 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) | #56544C | 0.073 |
| Deuteranopia (no green cones) | #4D4D4E | 0.071 |
| Tritanopia (no blue cones) | #005B56 | 0.015 |
| Achromatopsia (no color) | #505050 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155A4D
#155A4D
oklch(42.2% 0.07 177.2)
- #6C3D4E
#6C3D4E
oklch(42.3% 0.069 357.3)
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 #155A4D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Green #005249 ΔE 0.029
- Dark Green Blue #1F6357 ΔE 0.032
- Deep Teal #00555A ΔE 0.032
- Dark Slate Gray #2F4F4F ΔE 0.041
- Spruce #0A5F38 ΔE 0.042
- Pine #2B5D34 ΔE 0.044
- Petrol #005F6A ΔE 0.046
- Dark Teal #014D4E ΔE 0.047
Use #155A4D 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.