#03B3FF
Closest named color: Deep Sky Blue (#00BFFF). oklch(72.8% 0.161 237.9), rgb(3, 179, 255).
Aa
Black text reads best on this color (8.89:1).
About this color
#03B3FF is a medium-light, vivid blue. In OKLCH its lightness is 73%, its chroma 0.161 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.033 away. Black text reads best on it, at 8.89:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.89:1 |
| White text | 2.36:1 |
Values
| HEX | #03B3FF |
| RGB | rgb(3, 179, 255) |
| HSL | hsl(198, 100%, 51%) |
| OKLCH | oklch(72.8% 0.161 237.9) |
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 #03B3FF | 2.36:1 | Fails | Lc -50.7 | Large or bold text, headings |
| Black text on #03B3FF | 8.89:1 | AAA | Lc 58.2 | Large or bold text, headings |
| #03B3FF text on white | 2.36:1 | Fails | Lc 45.8 | Large or bold text, headings |
| #03B3FF text on black | 8.89:1 | AAA | Lc -56.3 | 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
#EEF7FE
oklch(97.1% 0.013 241)
-
Step 100
100
#D9EDFB
oklch(93.6% 0.028 238.2)
-
Step 200
200
#B8DFFA
oklch(88.5% 0.055 238.5)
-
Step 300
300
#80CAFA
oklch(80.9% 0.1 238.2)
-
Step 400
400 (this color)
#03B3FF
oklch(72.8% 0.161 237.9)
-
Step 500
500
#0093D3
oklch(63% 0.14 238.1)
-
Step 600
600
#007CB2
oklch(55.6% 0.123 237.7)
-
Step 700
700
#006897
oklch(49.1% 0.109 238.1)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950
#002A40
oklch(27% 0.06 237.8)
#03B3FF 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) | #8EB4FF | 0.087 |
| Deuteranopia (no green cones) | #6FA0FE | 0.068 |
| Tritanopia (no blue cones) | #00C6CE | 0.102 |
| Achromatopsia (no color) | #A9A9A9 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03B3FF
#03B3FF
oklch(72.8% 0.161 237.9)
- #F08928
#F08928
oklch(72.7% 0.161 57.7)
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 #03B3FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.033
- Bright Sky Blue #02CCFE ΔE 0.070
- Vivid Sky Blue #4CC9F0 ΔE 0.077
- Chefchaouen Blue #4895EF ΔE 0.078
- Cornflower Blue #6495ED ΔE 0.083
- Carolina Blue #8AB8FE ΔE 0.084
- Turquoise Blue #06B1C4 ΔE 0.088
- Dodger Blue #1E90FF ΔE 0.094
Use #03B3FF 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.