#039CD2
Closest named color: Dark Sky Blue (#448EE4). oklch(65.1% 0.133 232.2), rgb(3, 156, 210).
Aa
Black text reads best on this color (6.68:1).
About this color
#039CD2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.133 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.057 away. Black text reads best on it, at 6.68:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.68:1 |
| White text | 3.13:1 |
Values
| HEX | #039CD2 |
| RGB | rgb(3, 156, 210) |
| HSL | hsl(196, 97%, 42%) |
| OKLCH | oklch(65.1% 0.133 232.2) |
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 #039CD2 | 3.13:1 | AA large text | Lc -63.2 | Content text, not long reading |
| Black text on #039CD2 | 6.68:1 | AA | Lc 46.3 | Large or bold text, headings |
| #039CD2 text on white | 3.13:1 | AA large text | Lc 57.8 | Large or bold text, headings |
| #039CD2 text on black | 6.68:1 | AA | Lc -43.9 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F0F7FA
oklch(97.2% 0.008 225.1)
-
Step 100
100
#DEECF4
oklch(93.5% 0.018 232.5)
-
Step 200
200
#C2DEED
oklch(88.5% 0.036 231.1)
-
Step 300
300
#97C9E4
oklch(81% 0.065 232.2)
-
Step 400
400
#55ACD6
oklch(70.7% 0.104 231.7)
-
Step 500
500 (this color)
#039CD2
oklch(65.1% 0.133 232.2)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
Step 700
700
#006A90
oklch(49.2% 0.1 232)
-
Step 800
800
#005676
oklch(42.6% 0.087 232.3)
-
Step 900
900
#004863
oklch(37.7% 0.077 231.8)
-
Step 950
950
#002B3C
oklch(27.1% 0.054 230.4)
#039CD2 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) | #819AD5 | 0.086 |
| Deuteranopia (no green cones) | #688AD1 | 0.071 |
| Tritanopia (no blue cones) | #00AAAE | 0.077 |
| Achromatopsia (no color) | #919191 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #039CD2
#039CD2
oklch(65.1% 0.133 232.2)
- #CE763A
#CE763A
oklch(65.2% 0.133 52.3)
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 #039CD2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.057
- Water Blue #0E87CC ΔE 0.059
- Chefchaouen Blue #4895EF ΔE 0.060
- Blue NCS #118AB2 ΔE 0.063
- Faded Blue #658CBB ΔE 0.066
- Turquoise Blue #06B1C4 ΔE 0.070
- Cool Blue #4984B8 ΔE 0.070
- Cornflower Blue #6495ED ΔE 0.073
Use #039CD2 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.