#015B56
Closest named color: Deep Teal (#00555A). oklch(42.5% 0.073 188.3), rgb(1, 91, 86).
Aa
White text reads best on this color (7.97:1).
About this color
#015B56 is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 42%, its chroma 0.073 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.023 away. White text reads best on it, at 7.97:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.63:1 |
| White text | 7.97:1 |
Values
| HEX | #015B56 |
| RGB | rgb(1, 91, 86) |
| HSL | hsl(177, 98%, 18%) |
| OKLCH | oklch(42.5% 0.073 188.3) |
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 #015B56 | 7.97:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #015B56 | 2.63:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #015B56 text on white | 7.97:1 | AAA | Lc 87.2 | Fine for body text |
| #015B56 text on black | 2.63:1 | Fails | Lc -14.9 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E1EDEB
oklch(93.7% 0.013 185.1)
-
Step 200
200
#C8DFDC
oklch(88.6% 0.025 187.3)
-
Step 300
300
#A2CAC6
oklch(80.9% 0.043 188.8)
-
Step 400
400
#6CAFA9
oklch(70.8% 0.069 188.5)
-
Step 500
500
#3E9B94
oklch(63.2% 0.088 188.3)
-
Step 600
600
#06857E
oklch(55.6% 0.096 188.3)
-
Step 700
700
#00706A
oklch(49.1% 0.085 188.3)
-
Step 800
800 (this color)
#015B56
oklch(42.5% 0.073 188.3)
-
Step 900
900
#134B47
oklch(37.6% 0.057 188.2)
-
Step 950
950
#0E2C2A
oklch(27% 0.036 189.3)
#015B56 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) | #555556 | 0.078 |
| Deuteranopia (no green cones) | #4A4D57 | 0.074 |
| Tritanopia (no blue cones) | #005E59 | 0.010 |
| Achromatopsia (no color) | #515151 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #015B56
#015B56
oklch(42.5% 0.073 188.3)
- #703C46
#703C46
oklch(42.4% 0.074 8.4)
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 #015B56, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.023
- Dark Green Blue #1F6357 ΔE 0.031
- Dark Blue Green #005249 ΔE 0.032
- Petrol #005F6A ΔE 0.033
- Dark Slate Gray #2F4F4F ΔE 0.042
- Dark Teal #014D4E ΔE 0.046
- Dark Aqua #05696B ΔE 0.050
- Spruce #0A5F38 ΔE 0.053
Use #015B56 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.