#399FF8
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.6% 0.161 249), rgb(57, 159, 248).
Aa
Black text reads best on this color (7.48:1).
About this color
#399FF8 is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.161 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.027 away. Black text reads best on it, at 7.48:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.48:1 |
| White text | 2.80:1 |
Values
| HEX | #399FF8 |
| RGB | rgb(57, 159, 248) |
| HSL | hsl(208, 93%, 60%) |
| OKLCH | oklch(68.6% 0.161 249) |
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 #399FF8 | 2.80:1 | Fails | Lc -58.8 | Large or bold text, headings |
| Black text on #399FF8 | 7.48:1 | AAA | Lc 50.5 | Large or bold text, headings |
| #399FF8 text on white | 2.80:1 | Fails | Lc 53.5 | Large or bold text, headings |
| #399FF8 text on black | 7.48:1 | AAA | Lc -48.3 | 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 400.
-
Step 50
50
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DCECFD
oklch(93.6% 0.029 249.8)
-
Step 200
200
#BDDDFD
oklch(88.5% 0.056 248.5)
-
Step 300
300
#8DC6FF
oklch(80.9% 0.1 249.2)
-
Step 400
400 (this color)
#399FF8
oklch(68.6% 0.161 249)
-
Step 500
500
#008DED
oklch(63.1% 0.175 249.1)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#004376
oklch(37.6% 0.105 249.5)
-
Step 950
950
#002849
oklch(27.1% 0.074 248.8)
#399FF8 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) | #75A4FC | 0.055 |
| Deuteranopia (no green cones) | #5992F6 | 0.038 |
| Tritanopia (no blue cones) | #00B4C0 | 0.116 |
| Achromatopsia (no color) | #9A9A9A | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #399FF8
#399FF8
oklch(68.6% 0.161 249)
- #D58600
#D58600
oklch(68.7% 0.15 68.8)
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 #399FF8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.027
- Cornflower Blue #6495ED ΔE 0.039
- Dodger Blue #1E90FF ΔE 0.047
- Dark Sky Blue #448EE4 ΔE 0.049
- Soft Blue #6488EA ΔE 0.064
- Periwinkle Blue #8F99FB ΔE 0.083
- Deep Sky Blue #00BFFF ΔE 0.084
- Water Blue #0E87CC ΔE 0.091
Use #399FF8 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.