#01B5BB
Closest named color: Turquoise Blue (#06B1C4). oklch(70.2% 0.119 199), rgb(1, 181, 187).
Aa
Black text reads best on this color (8.32:1).
About this color
#01B5BB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.119 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.020 away. Black text reads best on it, at 8.32:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.32:1 |
| White text | 2.52:1 |
Values
| HEX | #01B5BB |
| RGB | rgb(1, 181, 187) |
| HSL | hsl(182, 99%, 37%) |
| OKLCH | oklch(70.2% 0.119 199) |
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 #01B5BB | 2.52:1 | Fails | Lc -53.9 | Large or bold text, headings |
| Black text on #01B5BB | 8.32:1 | AAA | Lc 55.2 | Large or bold text, headings |
| #01B5BB text on white | 2.52:1 | Fails | Lc 48.8 | Large or bold text, headings |
| #01B5BB text on black | 8.32:1 | AAA | Lc -53.2 | Large or bold text, headings |
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 400.
-
Step 50
50
#EEF8F8
oklch(97.2% 0.011 197)
-
Step 100
100
#DAEFEF
oklch(93.7% 0.022 196.8)
-
Step 200
200
#BAE2E3
oklch(88.5% 0.042 198.3)
-
Step 300
300
#85D0D3
oklch(81% 0.075 199)
-
Step 400
400 (this color)
#01B5BB
oklch(70.2% 0.119 199)
-
Step 500
500
#009DA2
oklch(63.2% 0.107 198.8)
-
Step 600
600
#008488
oklch(55.7% 0.095 198.5)
-
Step 700
700
#006F73
oklch(49.2% 0.084 199.2)
-
Step 800
800
#005B5E
oklch(42.8% 0.073 198.7)
-
Step 900
900
#004C4E
oklch(37.8% 0.064 197.8)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#01B5BB 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) | #A7ACBC | 0.123 |
| Deuteranopia (no green cones) | #919CBC | 0.114 |
| Tritanopia (no blue cones) | #00BCB6 | 0.024 |
| Achromatopsia (no color) | #A3A3A3 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01B5BB
#01B5BB
oklch(70.2% 0.119 199)
- #DF7F81
#DF7F81
oklch(70.1% 0.119 19.2)
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 #01B5BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.020
- Light Sea Green #20B2AA ΔE 0.024
- Topaz #13BBAF ΔE 0.029
- Greeny Blue #42B395 ΔE 0.055
- Cadet Blue #5F9EA0 ΔE 0.070
- Dark Turquoise #00CED1 ΔE 0.071
- Dull Teal #5F9E8F ΔE 0.079
- Greyblue #77A1B5 ΔE 0.079
Use #01B5BB 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.