#0366A7
Closest named color: Mid Blue (#276AB3). oklch(49.6% 0.13 247.1), rgb(3, 102, 167).
Aa
White text reads best on this color (6.06:1).
About this color
#0366A7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.130 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.028 away. White text reads best on it, at 6.06:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.46:1 |
| White text | 6.06:1 |
Values
| HEX | #0366A7 |
| RGB | rgb(3, 102, 167) |
| HSL | hsl(204, 96%, 33%) |
| OKLCH | oklch(49.6% 0.13 247.1) |
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 #0366A7 | 6.06:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #0366A7 | 3.46:1 | AA large text | Lc 24.4 | Dividers and decoration only |
| #0366A7 text on white | 6.06:1 | AA | Lc 79.7 | Fine for body text |
| #0366A7 text on black | 3.46:1 | AA large text | Lc -22.1 | 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
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C7DCEF
oklch(88.5% 0.035 245.5)
-
Step 300
300
#A1C5E8
oklch(80.9% 0.063 247.9)
-
Step 400
400
#6BA6DC
oklch(70.6% 0.101 247.3)
-
Step 500
500
#3F8FD2
oklch(63.1% 0.128 247)
-
Step 600
600
#1478BF
oklch(55.6% 0.138 246.8)
-
Step 700
700 (this color)
#0366A7
oklch(49.6% 0.13 247.1)
-
Step 800
800
#0A5286
oklch(42.7% 0.108 247.3)
-
Step 900
900
#14446B
oklch(37.6% 0.084 247.3)
-
Step 950
950
#0E283F
oklch(26.9% 0.054 248)
#0366A7 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) | #466AAA | 0.047 |
| Deuteranopia (no green cones) | #2D5CA6 | 0.031 |
| Tritanopia (no blue cones) | #00767E | 0.092 |
| Achromatopsia (no color) | #626262 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0366A7
#0366A7
oklch(49.6% 0.13 247.1)
- #8B5400
#8B5400
oklch(49.7% 0.11 67.2)
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 #0366A7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.028
- Peacock Blue #016795 ΔE 0.030
- Ocean Blue #03719C ΔE 0.040
- French Blue #436BAD ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.048
- Denim #3B638C ΔE 0.050
- Muted Blue #3B719F ΔE 0.051
- Dusky Blue #475F94 ΔE 0.052
Use #0366A7 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.