#00B4EA
Closest named color: Deep Sky Blue (#00BFFF). oklch(72% 0.141 228.6), rgb(0, 180, 234).
Aa
Black text reads best on this color (8.71:1).
About this color
#00B4EA is a medium-light, vivid teal or cyan. In OKLCH its lightness is 72%, its chroma 0.141 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.039 away. Black text reads best on it, at 8.71:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.71:1 |
| White text | 2.40:1 |
Values
| HEX | #00B4EA |
| RGB | rgb(0, 180, 234) |
| HSL | hsl(194, 100%, 46%) |
| OKLCH | oklch(72% 0.141 228.6) |
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 #00B4EA | 2.40:1 | Fails | Lc -51.7 | Large or bold text, headings |
| Black text on #00B4EA | 8.71:1 | AAA | Lc 57.2 | Large or bold text, headings |
| #00B4EA text on white | 2.40:1 | Fails | Lc 46.7 | Large or bold text, headings |
| #00B4EA text on black | 8.71:1 | AAA | Lc -55.3 | 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
#EEF7FC
oklch(97.1% 0.012 231.7)
-
Step 100
100
#D9EEF8
oklch(93.7% 0.026 227.9)
-
Step 200
200
#B9E0F3
oklch(88.5% 0.049 229)
-
Step 300
300
#81CCEE
oklch(80.9% 0.089 228.6)
-
Step 400
400 (this color)
#00B4EA
oklch(72% 0.141 228.6)
-
Step 500
500
#0097C4
oklch(63.2% 0.123 228.1)
-
Step 600
600
#007FA6
oklch(55.7% 0.109 228.5)
-
Step 700
700
#006A8C
oklch(49% 0.097 229.1)
-
Step 800
800
#005773
oklch(42.7% 0.084 228.5)
-
Step 900
900
#004861
oklch(37.6% 0.075 229.8)
-
Step 950
950
#002B3B
oklch(27% 0.053 228.8)
#00B4EA 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) | #98B1ED | 0.100 |
| Deuteranopia (no green cones) | #7D9FE9 | 0.084 |
| Tritanopia (no blue cones) | #00C3C6 | 0.078 |
| Achromatopsia (no color) | #A7A7A7 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00B4EA
#00B4EA
oklch(72% 0.141 228.6)
- #EA874E
#EA874E
oklch(72% 0.141 49.1)
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 #00B4EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.039
- Turquoise Blue #06B1C4 ΔE 0.056
- Bright Sky Blue #02CCFE ΔE 0.067
- Vivid Sky Blue #4CC9F0 ΔE 0.067
- Chefchaouen Blue #4895EF ΔE 0.087
- Cornflower Blue #6495ED ΔE 0.091
- Carolina Blue #8AB8FE ΔE 0.092
- Lightblue #7BC8F6 ΔE 0.092
Use #00B4EA 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.