#00A4CB
Closest named color: Turquoise Blue (#06B1C4). oklch(66.7% 0.124 222.7), rgb(0, 164, 203).
Aa
Black text reads best on this color (7.17:1).
About this color
#00A4CB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 67%, its chroma 0.124 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.042 away. Black text reads best on it, at 7.17:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.17:1 |
| White text | 2.92:1 |
Values
| HEX | #00A4CB |
| RGB | rgb(0, 164, 203) |
| HSL | hsl(192, 100%, 40%) |
| OKLCH | oklch(66.7% 0.124 222.7) |
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 #00A4CB | 2.92:1 | Fails | Lc -60.3 | Content text, not long reading |
| Black text on #00A4CB | 7.17:1 | AAA | Lc 49.0 | Large or bold text, headings |
| #00A4CB text on white | 2.92:1 | Fails | Lc 55.0 | Large or bold text, headings |
| #00A4CB text on black | 7.17:1 | AAA | Lc -46.8 | 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 500.
-
Step 50
50
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100
#DEEDF2
oklch(93.6% 0.017 219.7)
-
Step 200
200
#C2DFE9
oklch(88.6% 0.034 220.6)
-
Step 300
300
#96CADD
oklch(80.9% 0.06 222.5)
-
Step 400
400
#53AECC
oklch(70.7% 0.097 222.4)
-
Step 500
500 (this color)
#00A4CB
oklch(66.7% 0.124 222.7)
-
Step 600
600
#00809F
oklch(55.6% 0.103 222.6)
-
Step 700
700
#006B86
oklch(49% 0.091 223.1)
-
Step 800
800
#00586E
oklch(42.7% 0.079 222.3)
-
Step 900
900
#00495C
oklch(37.6% 0.07 222.6)
-
Step 950
950
#002B38
oklch(26.8% 0.05 223.6)
#00A4CB 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) | #8DA0CD | 0.097 |
| Deuteranopia (no green cones) | #7790CB | 0.086 |
| Tritanopia (no blue cones) | #00B0B1 | 0.060 |
| Achromatopsia (no color) | #979797 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00A4CB
#00A4CB
oklch(66.7% 0.124 222.7)
- #D37954
#D37954
oklch(66.7% 0.124 42.7)
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 #00A4CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.042
- Cadet Blue #5F9EA0 ΔE 0.071
- Greyblue #77A1B5 ΔE 0.073
- Light Sea Green #20B2AA ΔE 0.074
- Blue NCS #118AB2 ΔE 0.076
- Faded Blue #658CBB ΔE 0.077
- Chefchaouen Blue #4895EF ΔE 0.081
- Dark Sky Blue #448EE4 ΔE 0.082
Use #00A4CB 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.