#00A4BF
Closest named color: Turquoise Blue (#06B1C4). oklch(66.1% 0.117 214.9), rgb(0, 164, 191).
Aa
Black text reads best on this color (7.06:1).
About this color
#00A4BF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.117 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.037 away. Black text reads best on it, at 7.06:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.06:1 |
| White text | 2.97:1 |
Values
| HEX | #00A4BF |
| RGB | rgb(0, 164, 191) |
| HSL | hsl(188, 100%, 37%) |
| OKLCH | oklch(66.1% 0.117 214.9) |
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 #00A4BF | 2.97:1 | Fails | Lc -61.0 | Content text, not long reading |
| Black text on #00A4BF | 7.06:1 | AAA | Lc 48.4 | Large or bold text, headings |
| #00A4BF text on white | 2.97:1 | Fails | Lc 55.7 | Large or bold text, headings |
| #00A4BF text on black | 7.06:1 | AAA | Lc -46.1 | 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 500.
-
Step 50
50
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DEEDF1
oklch(93.6% 0.017 215.5)
-
Step 200
200
#C3DFE6
oklch(88.5% 0.031 214.5)
-
Step 300
300
#96CBD8
oklch(81% 0.058 214.5)
-
Step 400
400
#54AFC4
oklch(70.7% 0.091 215)
-
Step 500
500 (this color)
#00A4BF
oklch(66.1% 0.117 214.9)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D7F
oklch(49.2% 0.087 214.3)
-
Step 800
800
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900
#004A58
oklch(37.7% 0.067 215.8)
-
Step 950
950
#002C35
oklch(27% 0.048 215.4)
#00A4BF 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) | #919EC1 | 0.104 |
| Deuteranopia (no green cones) | #7C8FBF | 0.093 |
| Tritanopia (no blue cones) | #00AEAC | 0.047 |
| Achromatopsia (no color) | #969696 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00A4BF
#00A4BF
oklch(66.1% 0.117 214.9)
- #D07761
#D07761
oklch(66.2% 0.117 34.8)
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 #00A4BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.037
- Cadet Blue #5F9EA0 ΔE 0.058
- Light Sea Green #20B2AA ΔE 0.060
- Sea #3C9992 ΔE 0.065
- Persian Green #2A9D8F ΔE 0.069
- Teal Green #0A9396 ΔE 0.070
- Greyblue #77A1B5 ΔE 0.070
- Blue Green #0F9B8E ΔE 0.072
Use #00A4BF 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.