#00A4D1
Closest named color: Turquoise Blue (#06B1C4). oklch(67% 0.128 226.2), rgb(0, 164, 209).
Aa
Black text reads best on this color (7.23:1).
About this color
#00A4D1 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 67%, its chroma 0.128 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.047 away. Black text reads best on it, at 7.23:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.23:1 |
| White text | 2.90:1 |
Values
| HEX | #00A4D1 |
| RGB | rgb(0, 164, 209) |
| HSL | hsl(193, 100%, 41%) |
| OKLCH | oklch(67% 0.128 226.2) |
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 #00A4D1 | 2.90:1 | Fails | Lc -60.0 | Content text, not long reading |
| Black text on #00A4D1 | 7.23:1 | AAA | Lc 49.3 | Large or bold text, headings |
| #00A4D1 text on white | 2.90:1 | Fails | Lc 54.7 | Large or bold text, headings |
| #00A4D1 text on black | 7.23:1 | AAA | Lc -47.1 | 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 400.
-
Step 50
50
#EEF7FB
oklch(97.1% 0.011 226)
-
Step 100
100
#DAEDF6
oklch(93.5% 0.024 227.7)
-
Step 200
200
#BBE0F0
oklch(88.5% 0.045 225.9)
-
Step 300
300
#87CCE8
oklch(80.9% 0.08 225.5)
-
Step 400
400 (this color)
#00A4D1
oklch(67% 0.128 226.2)
-
Step 500
500
#0097C1
oklch(63% 0.121 226.4)
-
Step 600
600
#007FA3
oklch(55.6% 0.107 226.4)
-
Step 700
700
#006B89
oklch(49.1% 0.094 225.7)
-
Step 800
800
#005771
oklch(42.6% 0.082 226.6)
-
Step 900
900
#00495F
oklch(37.8% 0.072 226.2)
-
Step 950
950
#002B3A
oklch(27% 0.052 227.2)
#00A4D1 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) | #8BA1D3 | 0.094 |
| Deuteranopia (no green cones) | #7490D0 | 0.082 |
| Tritanopia (no blue cones) | #00B1B3 | 0.067 |
| Achromatopsia (no color) | #979797 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00A4D1
#00A4D1
oklch(67% 0.128 226.2)
- #D57A4D
#D57A4D
oklch(67.1% 0.128 46.1)
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 #00A4D1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.047
- Chefchaouen Blue #4895EF ΔE 0.073
- Dark Sky Blue #448EE4 ΔE 0.075
- Greyblue #77A1B5 ΔE 0.076
- Faded Blue #658CBB ΔE 0.077
- Cadet Blue #5F9EA0 ΔE 0.078
- Blue NCS #118AB2 ΔE 0.079
- Light Sea Green #20B2AA ΔE 0.081
Use #00A4D1 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.