#0366A2
Closest named color: Peacock Blue (#016795). oklch(49.3% 0.123 245.1), rgb(3, 102, 162).
Aa
White text reads best on this color (6.12:1).
About this color
#0366A2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.123 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.022 away. White text reads best on it, at 6.12:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.42:1 |
| White text | 6.12:1 |
Values
| HEX | #0366A2 |
| RGB | rgb(3, 102, 162) |
| HSL | hsl(203, 96%, 32%) |
| OKLCH | oklch(49.3% 0.123 245.1) |
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 #0366A2 | 6.12:1 | AA | Lc -85.2 | Fine for body text |
| Black text on #0366A2 | 3.42:1 | AA large text | Lc 24.1 | Dividers and decoration only |
| #0366A2 text on white | 6.12:1 | AA | Lc 80.0 | Fine for body text |
| #0366A2 text on black | 3.42:1 | AA large text | Lc -21.8 | Dividers and decoration only |
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 700.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEE
oklch(88.5% 0.033 245.3)
-
Step 300
300
#A1C5E5
oklch(80.8% 0.06 245.5)
-
Step 400
400
#6CA7D8
oklch(70.7% 0.095 244.8)
-
Step 500
500
#4090CE
oklch(63.1% 0.122 245)
-
Step 600
600
#1679BB
oklch(55.6% 0.132 245)
-
Step 700
700 (this color)
#0366A2
oklch(49.3% 0.123 245.1)
-
Step 800
800
#0B5383
oklch(42.7% 0.102 245.2)
-
Step 900
900
#154569
oklch(37.7% 0.08 245.2)
-
Step 950
950
#0E293D
oklch(27.1% 0.05 243.6)
#0366A2 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) | #4969A4 | 0.050 |
| Deuteranopia (no green cones) | #325CA1 | 0.034 |
| Tritanopia (no blue cones) | #00757C | 0.086 |
| Achromatopsia (no color) | #626262 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0366A2
#0366A2
oklch(49.3% 0.123 245.1)
- #8B5200
#8B5200
oklch(49.3% 0.11 65.4)
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 #0366A2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.022
- Mid Blue #276AB3 ΔE 0.034
- Ocean Blue #03719C ΔE 0.036
- Denim #3B638C ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.044
- French Blue #436BAD ΔE 0.049
- Dusky Blue #475F94 ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.049
Use #0366A2 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.