#399BED
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.1% 0.151 247.9), rgb(57, 155, 237).
Aa
Black text reads best on this color (7.08:1).
About this color
#399BED is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.151 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.018 away. Black text reads best on it, at 7.08:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.08:1 |
| White text | 2.96:1 |
Values
| HEX | #399BED |
| RGB | rgb(57, 155, 237) |
| HSL | hsl(207, 83%, 58%) |
| OKLCH | oklch(67.1% 0.151 247.9) |
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 #399BED | 2.96:1 | Fails | Lc -61.1 | Content text, not long reading |
| Black text on #399BED | 7.08:1 | AAA | Lc 48.3 | Large or bold text, headings |
| #399BED text on white | 2.96:1 | Fails | Lc 55.8 | Large or bold text, headings |
| #399BED text on black | 7.08:1 | AAA | Lc -46.0 | 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
#DCECFC
oklch(93.6% 0.028 248.1)
-
Step 200
200
#BFDDFB
oklch(88.5% 0.052 248.4)
-
Step 300
300
#8FC6FB
oklch(80.8% 0.095 248.2)
-
Step 400
400 (this color)
#399BED
oklch(67.1% 0.151 247.9)
-
Step 500
500
#008EE9
oklch(63.1% 0.169 247.8)
-
Step 600
600
#0077C5
oklch(55.6% 0.149 247.9)
-
Step 700
700
#0064A7
oklch(49.1% 0.132 247.9)
-
Step 800
800
#00528A
oklch(42.8% 0.115 247.8)
-
Step 900
900
#004474
oklch(37.7% 0.101 247.8)
-
Step 950
950
#002848
oklch(27% 0.073 248.1)
#399BED 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) | #759FF0 | 0.055 |
| Deuteranopia (no green cones) | #5B8EEB | 0.039 |
| Tritanopia (no blue cones) | #00AFB9 | 0.110 |
| Achromatopsia (no color) | #969696 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #399BED
#399BED
oklch(67.1% 0.151 247.9)
- #D08100
#D08100
oklch(67.1% 0.148 67.7)
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 #399BED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.018
- Dark Sky Blue #448EE4 ΔE 0.034
- Cornflower Blue #6495ED ΔE 0.036
- Dodger Blue #1E90FF ΔE 0.046
- Soft Blue #6488EA ΔE 0.056
- Water Blue #0E87CC ΔE 0.074
- Faded Blue #658CBB ΔE 0.080
- Periwinkle Blue #8F99FB ΔE 0.089
Use #399BED 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.