#04C0FA
Closest named color: Deep Sky Blue (#00BFFF). oklch(75.5% 0.148 229), rgb(4, 192, 250).
Aa
Black text reads best on this color (9.92:1).
About this color
#04C0FA is a medium-light, vivid teal or cyan. In OKLCH its lightness is 76%, its chroma 0.148 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.009 away. Black text reads best on it, at 9.92:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.92:1 |
| White text | 2.11:1 |
Values
| HEX | #04C0FA |
| RGB | rgb(4, 192, 250) |
| HSL | hsl(194, 97%, 50%) |
| OKLCH | oklch(75.5% 0.148 229) |
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 #04C0FA | 2.11:1 | Fails | Lc -45.4 | Large or bold text, headings |
| Black text on #04C0FA | 9.92:1 | AAA | Lc 63.2 | Content text, not long reading |
| #04C0FA text on white | 2.11:1 | Fails | Lc 40.8 | Non-text elements, placeholder text |
| #04C0FA text on black | 9.92:1 | AAA | Lc -61.5 | Content text, not long reading |
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
#EDF7FC
oklch(97% 0.013 228.9)
-
Step 100
100
#D8EEF8
oklch(93.6% 0.027 226.8)
-
Step 200
200
#B7E0F5
oklch(88.4% 0.052 230.3)
-
Step 300
300
#7ECCF1
oklch(80.8% 0.093 229.9)
-
Step 400
400 (this color)
#04C0FA
oklch(75.5% 0.148 229)
-
Step 500
500
#0097C5
oklch(63.2% 0.124 228.7)
-
Step 600
600
#007EA6
oklch(55.5% 0.11 229.3)
-
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)
#04C0FA 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) | #A2BDFD | 0.104 |
| Deuteranopia (no green cones) | #85AAF9 | 0.087 |
| Tritanopia (no blue cones) | #00D0D4 | 0.082 |
| Achromatopsia (no color) | #B2B2B2 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04C0FA
#04C0FA
oklch(75.5% 0.148 229)
- #FA9053
#FA9053
oklch(75.5% 0.149 49)
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 #04C0FA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.009
- Bright Sky Blue #02CCFE ΔE 0.033
- Vivid Sky Blue #4CC9F0 ΔE 0.041
- Lightblue #7BC8F6 ΔE 0.067
- Sky #82CAFC ΔE 0.076
- Carolina Blue #8AB8FE ΔE 0.078
- Aqua Blue #02D8E9 ΔE 0.078
- Dark Turquoise #00CED1 ΔE 0.081
Use #04C0FA 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.