#04C3FD
Closest named color: Deep Sky Blue (#00BFFF). oklch(76.4% 0.15 228.6), rgb(4, 195, 253).
Aa
Black text reads best on this color (10.22:1).
About this color
#04C3FD is a medium-light, vivid teal or cyan. In OKLCH its lightness is 76%, its chroma 0.150 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.012 away. Black text reads best on it, at 10.22:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 10.22:1 |
| White text | 2.05:1 |
Values
| HEX | #04C3FD |
| RGB | rgb(4, 195, 253) |
| HSL | hsl(194, 98%, 50%) |
| OKLCH | oklch(76.4% 0.15 228.6) |
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 #04C3FD | 2.05:1 | Fails | Lc -43.8 | Non-text elements, placeholder text |
| Black text on #04C3FD | 10.22:1 | AAA | Lc 64.6 | Content text, not long reading |
| #04C3FD text on white | 2.05:1 | Fails | Lc 39.3 | Non-text elements, placeholder text |
| #04C3FD text on black | 10.22:1 | AAA | Lc -63.0 | 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 300.
-
Step 50
50
#EAF8FF
oklch(97.1% 0.018 229)
-
Step 100
100
#D0F0FF
oklch(93.7% 0.039 227.7)
-
Step 200
200
#A8E3FF
oklch(88.5% 0.071 228.9)
-
Step 300
300 (this color)
#04C3FD
oklch(76.4% 0.15 228.6)
-
Step 400
400
#00B0E5
oklch(70.8% 0.139 228.7)
-
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)
#04C3FD 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) | #A4C0FF | 0.104 |
| Deuteranopia (no green cones) | #88ACFC | 0.090 |
| Tritanopia (no blue cones) | #00D3D6 | 0.083 |
| Achromatopsia (no color) | #B5B5B5 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04C3FD
#04C3FD
oklch(76.4% 0.15 228.6)
- #FD9256
#FD9256
oklch(76.3% 0.149 48.5)
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 #04C3FD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.012
- Bright Sky Blue #02CCFE ΔE 0.025
- Vivid Sky Blue #4CC9F0 ΔE 0.037
- Lightblue #7BC8F6 ΔE 0.063
- Sky #82CAFC ΔE 0.071
- Aqua Blue #02D8E9 ΔE 0.073
- Carolina Blue #8AB8FE ΔE 0.078
- Dark Turquoise #00CED1 ΔE 0.080
Use #04C3FD 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.