#03B9ED
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.3% 0.141 227.1), rgb(3, 185, 237).
Aa
Black text reads best on this color (9.16:1).
About this color
#03B9ED is a medium-light, vivid teal or cyan. In OKLCH its lightness is 73%, its chroma 0.141 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.028 away. Black text reads best on it, at 9.16:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.16:1 |
| White text | 2.29:1 |
Values
| HEX | #03B9ED |
| RGB | rgb(3, 185, 237) |
| HSL | hsl(193, 98%, 47%) |
| OKLCH | oklch(73.3% 0.141 227.1) |
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 #03B9ED | 2.29:1 | Fails | Lc -49.3 | Large or bold text, headings |
| Black text on #03B9ED | 9.16:1 | AAA | Lc 59.5 | Large or bold text, headings |
| #03B9ED text on white | 2.29:1 | Fails | Lc 44.5 | Non-text elements, placeholder text |
| #03B9ED text on black | 9.16:1 | AAA | Lc -57.6 | 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
#D9EEF7
oklch(93.6% 0.025 225.3)
-
Step 200
200
#B8E0F3
oklch(88.4% 0.049 228.3)
-
Step 300
300
#80CDED
oklch(81% 0.088 226.5)
-
Step 400
400 (this color)
#03B9ED
oklch(73.3% 0.141 227.1)
-
Step 500
500
#0097C2
oklch(63.1% 0.122 226.9)
-
Step 600
600
#007FA4
oklch(55.6% 0.108 227.1)
-
Step 700
700
#006B8A
oklch(49.2% 0.095 226.5)
-
Step 800
800
#005772
oklch(42.6% 0.083 227.6)
-
Step 900
900
#00495F
oklch(37.8% 0.072 226.2)
-
Step 950
950
#002B3A
oklch(27% 0.052 227.2)
#03B9ED 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) | #9DB6F0 | 0.103 |
| Deuteranopia (no green cones) | #82A3EC | 0.088 |
| Tritanopia (no blue cones) | #00C8CA | 0.076 |
| Achromatopsia (no color) | #ABABAB | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03B9ED
#03B9ED
oklch(73.3% 0.141 227.1)
- #F08A55
#F08A55
oklch(73.3% 0.142 47)
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 #03B9ED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.028
- Bright Sky Blue #02CCFE ΔE 0.053
- Vivid Sky Blue #4CC9F0 ΔE 0.054
- Turquoise Blue #06B1C4 ΔE 0.060
- Lightblue #7BC8F6 ΔE 0.081
- Dark Turquoise #00CED1 ΔE 0.082
- Carolina Blue #8AB8FE ΔE 0.086
- Aqua Blue #02D8E9 ΔE 0.090
Use #03B9ED 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.