#00A3B8
Closest named color: Turquoise Blue (#06B1C4). oklch(65.6% 0.114 210.8), rgb(0, 163, 184).
Aa
Black text reads best on this color (6.93:1).
About this color
#00A3B8 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.114 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.041 away. Black text reads best on it, at 6.93:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 6.93:1 |
| White text | 3.02:1 |
Values
| HEX | #00A3B8 |
| RGB | rgb(0, 163, 184) |
| HSL | hsl(187, 100%, 36%) |
| OKLCH | oklch(65.6% 0.114 210.8) |
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 #00A3B8 | 3.02:1 | AA large text | Lc -61.8 | Content text, not long reading |
| Black text on #00A3B8 | 6.93:1 | AA | Lc 47.6 | Large or bold text, headings |
| #00A3B8 text on white | 3.02:1 | AA large text | Lc 56.4 | Large or bold text, headings |
| #00A3B8 text on black | 6.93:1 | AA | Lc -45.4 | 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
#F0F7F8
oklch(97.1% 0.008 207.1)
-
Step 100
100
#DEEDF0
oklch(93.6% 0.016 211)
-
Step 200
200
#C3DFE5
oklch(88.5% 0.031 212.1)
-
Step 300
300
#97CBD5
oklch(80.9% 0.056 210.7)
-
Step 400
400
#55B0C0
oklch(70.8% 0.089 210.5)
-
Step 500
500 (this color)
#00A3B8
oklch(65.6% 0.114 210.8)
-
Step 600
600
#008293
oklch(55.6% 0.096 210.7)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#005966
oklch(42.6% 0.074 211.8)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#00A3B8 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) | #929DB9 | 0.106 |
| Deuteranopia (no green cones) | #7D8EB8 | 0.095 |
| Tritanopia (no blue cones) | #00ACA9 | 0.040 |
| Achromatopsia (no color) | #949494 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00A3B8
#00A3B8
oklch(65.6% 0.114 210.8)
- #CD7566
#CD7566
oklch(65.6% 0.114 30.6)
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 #00A3B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.041
- Cadet Blue #5F9EA0 ΔE 0.052
- Sea #3C9992 ΔE 0.056
- Light Sea Green #20B2AA ΔE 0.056
- Persian Green #2A9D8F ΔE 0.059
- Teal Green #0A9396 ΔE 0.061
- Blue Green #0F9B8E ΔE 0.062
- Dull Teal #5F9E8F ΔE 0.068
Use #00A3B8 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.