#399FD1
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.6% 0.118 234.1), rgb(57, 159, 209).
Aa
Black text reads best on this color (7.05:1).
About this color
#399FD1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.118 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.059 away. Black text reads best on it, at 7.05:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.05:1 |
| White text | 2.97:1 |
Values
| HEX | #399FD1 |
| RGB | rgb(57, 159, 209) |
| HSL | hsl(200, 62%, 52%) |
| OKLCH | oklch(66.6% 0.118 234.1) |
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 #399FD1 | 2.97:1 | Fails | Lc -61.4 | Content text, not long reading |
| Black text on #399FD1 | 7.05:1 | AAA | Lc 48.0 | Large or bold text, headings |
| #399FD1 text on white | 2.97:1 | Fails | Lc 56.0 | Large or bold text, headings |
| #399FD1 text on black | 7.05:1 | AAA | Lc -45.8 | 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 500.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C5DDEB
oklch(88.4% 0.032 233.3)
-
Step 300
300
#9DC7E1
oklch(80.8% 0.058 235.6)
-
Step 400
400
#62AAD2
oklch(70.7% 0.093 234.5)
-
Step 500
500 (this color)
#399FD1
oklch(66.6% 0.118 234.1)
-
Step 600
600
#007DAD
oklch(55.6% 0.117 234.3)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800
#005678
oklch(42.7% 0.089 233.9)
-
Step 900
900
#044764
oklch(37.6% 0.077 234.7)
-
Step 950
950
#082A3B
oklch(27% 0.049 234.9)
#399FD1 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) | #879ED3 | 0.074 |
| Deuteranopia (no green cones) | #728FD0 | 0.062 |
| Tritanopia (no blue cones) | #00ACB0 | 0.073 |
| Achromatopsia (no color) | #959595 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #399FD1
#399FD1
oklch(66.6% 0.118 234.1)
- #CB7F49
#CB7F49
oklch(66.6% 0.117 54.6)
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 #399FD1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.059
- Faded Blue #658CBB ΔE 0.060
- Dark Sky Blue #448EE4 ΔE 0.061
- Turquoise Blue #06B1C4 ΔE 0.061
- Cornflower Blue #6495ED ΔE 0.066
- Greyblue #77A1B5 ΔE 0.067
- Water Blue #0E87CC ΔE 0.073
- Blue NCS #118AB2 ΔE 0.075
Use #399FD1 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.