#01B9CC
Closest named color: Turquoise Blue (#06B1C4). oklch(71.9% 0.123 207.8), rgb(1, 185, 204).
Aa
Black text reads best on this color (8.81:1).
About this color
#01B9CC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.123 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.023 away. Black text reads best on it, at 8.81:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.81:1 |
| White text | 2.38:1 |
Values
| HEX | #01B9CC |
| RGB | rgb(1, 185, 204) |
| HSL | hsl(186, 99%, 40%) |
| OKLCH | oklch(71.9% 0.123 207.8) |
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 #01B9CC | 2.38:1 | Fails | Lc -51.2 | Large or bold text, headings |
| Black text on #01B9CC | 8.81:1 | AAA | Lc 57.7 | Large or bold text, headings |
| #01B9CC text on white | 2.38:1 | Fails | Lc 46.3 | Large or bold text, headings |
| #01B9CC text on black | 8.81:1 | AAA | Lc -55.8 | 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
#EEF8F9
oklch(97.2% 0.011 204.1)
-
Step 100
100
#DAEEF2
oklch(93.6% 0.022 211)
-
Step 200
200
#B9E2E8
oklch(88.6% 0.043 207.3)
-
Step 300
300
#83CFDA
oklch(80.9% 0.077 207.4)
-
Step 400
400 (this color)
#01B9CC
oklch(71.9% 0.123 207.8)
-
Step 500
500
#009BAB
oklch(63% 0.108 207.7)
-
Step 600
600
#008290
oklch(55.5% 0.095 208)
-
Step 700
700
#006E79
oklch(49.2% 0.084 206.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950
#002D32
oklch(27.1% 0.046 206.3)
#01B9CC 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) | #A7B1CD | 0.118 |
| Deuteranopia (no green cones) | #90A1CC | 0.107 |
| Tritanopia (no blue cones) | #00C2BF | 0.037 |
| Achromatopsia (no color) | #A8A8A8 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01B9CC
#01B9CC
oklch(71.9% 0.123 207.8)
- #E78479
#E78479
oklch(71.8% 0.124 27.3)
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 #01B9CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.023
- Topaz #13BBAF ΔE 0.045
- Light Sea Green #20B2AA ΔE 0.048
- Dark Turquoise #00CED1 ΔE 0.059
- Vivid Sky Blue #4CC9F0 ΔE 0.071
- Deep Sky Blue #00BFFF ΔE 0.074
- Medium Turquoise #48D1CC ΔE 0.076
- Greeny Blue #42B395 ΔE 0.077
Use #01B9CC 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.