#0381AF
Closest named color: Nice Blue (#107AB0). oklch(56.7% 0.116 232.6), rgb(3, 129, 175).
Aa
Black text reads best on this color (4.76:1).
About this color
#0381AF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.116 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.021 away. Black text reads best on it, at 4.76:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.76:1 |
| White text | 4.40:1 |
Values
| HEX | #0381AF |
| RGB | rgb(3, 129, 175) |
| HSL | hsl(196, 97%, 35%) |
| OKLCH | oklch(56.7% 0.116 232.6) |
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 #0381AF | 4.40:1 | AA large text | Lc -75.5 | Fine for body text |
| Black text on #0381AF | 4.76:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #0381AF text on white | 4.40:1 | AA large text | Lc 70.0 | Content text, not long reading |
| #0381AF text on black | 4.76:1 | AA | Lc -31.7 | 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 600.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF2
oklch(93.6% 0.015 229)
-
Step 200
200
#C7DDE9
oklch(88.5% 0.029 231.5)
-
Step 300
300
#A0C7DD
oklch(80.9% 0.052 233)
-
Step 400
400
#69AACC
oklch(70.7% 0.083 232.5)
-
Step 500
500
#3994BF
oklch(63.1% 0.106 232.6)
-
Step 600
600 (this color)
#0381AF
oklch(56.7% 0.116 232.6)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#0F4760
oklch(37.6% 0.07 232.9)
-
Step 950
950
#0C2A38
oklch(27% 0.044 231.9)
#0381AF 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) | #6A80B1 | 0.074 |
| Deuteranopia (no green cones) | #5572AE | 0.061 |
| Tritanopia (no blue cones) | #008D91 | 0.067 |
| Achromatopsia (no color) | #787878 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0381AF
#0381AF
oklch(56.7% 0.116 232.6)
- #AB612E
#AB612E
oklch(56.8% 0.116 52.6)
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 #0381AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.021
- Blue NCS #118AB2 ΔE 0.027
- Steel Blue #4682B4 ΔE 0.036
- Teal Blue #01889F ΔE 0.037
- Cerulean #457B9D ΔE 0.040
- Cool Blue #4984B8 ΔE 0.042
- Flat Blue #3C73A8 ΔE 0.043
- Windows Blue #3778BF ΔE 0.045
Use #0381AF 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.