#00A3C9
Closest named color: Turquoise Blue (#06B1C4). oklch(66.3% 0.123 222.2), rgb(0, 163, 201).
Aa
Black text reads best on this color (7.08:1).
About this color
#00A3C9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.123 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.044 away. Black text reads best on it, at 7.08:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.08:1 |
| White text | 2.96:1 |
Values
| HEX | #00A3C9 |
| RGB | rgb(0, 163, 201) |
| HSL | hsl(191, 100%, 39%) |
| OKLCH | oklch(66.3% 0.123 222.2) |
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 #00A3C9 | 2.96:1 | Fails | Lc -60.9 | Content text, not long reading |
| Black text on #00A3C9 | 7.08:1 | AAA | Lc 48.5 | Large or bold text, headings |
| #00A3C9 text on white | 2.96:1 | Fails | Lc 55.6 | Large or bold text, headings |
| #00A3C9 text on black | 7.08:1 | AAA | Lc -46.2 | 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 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)
#00A3C9
oklch(66.3% 0.123 222.2)
-
Step 600
600
#00809E
oklch(55.6% 0.103 221.9)
-
Step 700
700
#006C86
oklch(49.3% 0.091 222.1)
-
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
#002C38
oklch(27.2% 0.05 221.4)
#00A3C9 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) | #8D9FCB | 0.098 |
| Deuteranopia (no green cones) | #768FC9 | 0.086 |
| Tritanopia (no blue cones) | #00AFAF | 0.060 |
| Achromatopsia (no color) | #969696 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00A3C9
#00A3C9
oklch(66.3% 0.123 222.2)
- #D17854
#D17854
oklch(66.3% 0.122 42.4)
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 #00A3C9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.044
- Cadet Blue #5F9EA0 ΔE 0.069
- Greyblue #77A1B5 ΔE 0.073
- Blue NCS #118AB2 ΔE 0.073
- Light Sea Green #20B2AA ΔE 0.074
- Faded Blue #658CBB ΔE 0.075
- Sea #3C9992 ΔE 0.079
- Teal Green #0A9396 ΔE 0.081
Use #00A3C9 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.