#00BCDF
Closest named color: Turquoise Blue (#06B1C4). oklch(73.4% 0.131 217.5), rgb(0, 188, 223).
Aa
Black text reads best on this color (9.25:1).
About this color
#00BCDF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.131 and its hue 218°. 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 9.25:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 9.25:1 |
| White text | 2.26:1 |
Values
| HEX | #00BCDF |
| RGB | rgb(0, 188, 223) |
| HSL | hsl(189, 100%, 44%) |
| OKLCH | oklch(73.4% 0.131 217.5) |
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 #00BCDF | 2.26:1 | Fails | Lc -48.8 | Large or bold text, headings |
| Black text on #00BCDF | 9.25:1 | AAA | Lc 59.9 | Large or bold text, headings |
| #00BCDF text on white | 2.26:1 | Fails | Lc 44.0 | Non-text elements, placeholder text |
| #00BCDF text on black | 9.25:1 | AAA | Lc -58.1 | 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
#EEF7FA
oklch(97% 0.01 219.6)
-
Step 100
100
#D9EEF4
oklch(93.5% 0.024 216.7)
-
Step 200
200
#B8E1ED
oklch(88.4% 0.046 217.5)
-
Step 300
300
#81CEE4
oklch(80.9% 0.082 218)
-
Step 400
400 (this color)
#00BCDF
oklch(73.4% 0.131 217.5)
-
Step 500
500
#0099B6
oklch(63% 0.113 217.6)
-
Step 600
600
#00819A
oklch(55.7% 0.1 217.7)
-
Step 700
700
#006C81
oklch(49% 0.088 217.4)
-
Step 800
800
#00596A
oklch(42.8% 0.076 216.6)
-
Step 900
900
#004A59
oklch(37.7% 0.067 217.2)
-
Step 950
950
#002C36
oklch(27% 0.048 217.4)
#00BCDF 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) | #A5B6E1 | 0.112 |
| Deuteranopia (no green cones) | #8DA4DF | 0.102 |
| Tritanopia (no blue cones) | #00C8C7 | 0.057 |
| Achromatopsia (no color) | #ACACAC | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00BCDF
#00BCDF
oklch(73.4% 0.131 217.5)
- #EF896B
#EF896B
oklch(73.3% 0.132 37.2)
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 #00BCDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.044
- Deep Sky Blue #00BFFF ΔE 0.047
- Vivid Sky Blue #4CC9F0 ΔE 0.051
- Bright Sky Blue #02CCFE ΔE 0.056
- Dark Turquoise #00CED1 ΔE 0.061
- Topaz #13BBAF ΔE 0.071
- Light Sea Green #20B2AA ΔE 0.076
- Aqua Blue #02D8E9 ΔE 0.077
Use #00BCDF 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.