#03A5DF
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.9% 0.139 232.7), rgb(3, 165, 223).
Aa
Black text reads best on this color (7.45:1).
About this color
#03A5DF is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.139 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.058 away. Black text reads best on it, at 7.45:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.45:1 |
| White text | 2.81:1 |
Values
| HEX | #03A5DF |
| RGB | rgb(3, 165, 223) |
| HSL | hsl(196, 97%, 44%) |
| OKLCH | oklch(67.9% 0.139 232.7) |
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 #03A5DF | 2.81:1 | Fails | Lc -58.7 | Large or bold text, headings |
| Black text on #03A5DF | 7.45:1 | AAA | Lc 50.6 | Large or bold text, headings |
| #03A5DF text on white | 2.81:1 | Fails | Lc 53.5 | Large or bold text, headings |
| #03A5DF text on black | 7.45:1 | AAA | Lc -48.4 | 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
#DAEDF8
oklch(93.5% 0.025 233)
-
Step 200
200
#BADFF4
oklch(88.4% 0.049 232.9)
-
Step 300
300
#86CBF0
oklch(81% 0.087 232.8)
-
Step 400
400 (this color)
#03A5DF
oklch(67.9% 0.139 232.7)
-
Step 500
500
#0095CA
oklch(63% 0.13 232.7)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#002B3D
oklch(27.1% 0.055 231.9)
#03A5DF 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) | #88A4E2 | 0.089 |
| Deuteranopia (no green cones) | #6E92DE | 0.074 |
| Tritanopia (no blue cones) | #00B4B9 | 0.081 |
| Achromatopsia (no color) | #9A9A9A | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03A5DF
#03A5DF
oklch(67.9% 0.139 232.7)
- #DA7D3C
#DA7D3C
oklch(68% 0.14 52.8)
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 #03A5DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.058
- Turquoise Blue #06B1C4 ΔE 0.060
- Dark Sky Blue #448EE4 ΔE 0.066
- Cornflower Blue #6495ED ΔE 0.070
- Deep Sky Blue #00BFFF ΔE 0.078
- Dodger Blue #1E90FF ΔE 0.082
- Faded Blue #658CBB ΔE 0.084
- Water Blue #0E87CC ΔE 0.084
Use #03A5DF 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.