#399AE2
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.3% 0.139 244.9), rgb(57, 154, 226).
Aa
Black text reads best on this color (6.89:1).
About this color
#399AE2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.139 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.028 away. Black text reads best on it, at 6.89:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.89:1 |
| White text | 3.04:1 |
Values
| HEX | #399AE2 |
| RGB | rgb(57, 154, 226) |
| HSL | hsl(206, 74%, 55%) |
| OKLCH | oklch(66.3% 0.139 244.9) |
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 #399AE2 | 3.04:1 | AA large text | Lc -62.3 | Content text, not long reading |
| Black text on #399AE2 | 6.89:1 | AA | Lc 47.1 | Large or bold text, headings |
| #399AE2 text on white | 3.04:1 | AA large text | Lc 56.9 | Large or bold text, headings |
| #399AE2 text on black | 6.89:1 | AA | Lc -44.9 | 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 500.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C5DCF1
oklch(88.4% 0.038 245.8)
-
Step 300
300
#9CC6EA
oklch(80.9% 0.068 244.6)
-
Step 400
400
#62A7E0
oklch(70.6% 0.109 245.1)
-
Step 500
500 (this color)
#399AE2
oklch(66.3% 0.139 244.9)
-
Step 600
600
#0079BF
oklch(55.7% 0.14 245)
-
Step 700
700
#0065A1
oklch(49% 0.124 245.1)
-
Step 800
800
#005385
oklch(42.7% 0.107 244.8)
-
Step 900
900
#06456E
oklch(37.7% 0.091 244.8)
-
Step 950
950
#082940
oklch(27% 0.057 243.6)
#399AE2 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) | #799CE5 | 0.060 |
| Deuteranopia (no green cones) | #618DE1 | 0.044 |
| Tritanopia (no blue cones) | #00ABB4 | 0.097 |
| Achromatopsia (no color) | #949494 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #399AE2
#399AE2
oklch(66.3% 0.139 244.9)
- #CC7E1E
#CC7E1E
oklch(66.2% 0.139 64.9)
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 #399AE2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.028
- Dark Sky Blue #448EE4 ΔE 0.033
- Cornflower Blue #6495ED ΔE 0.042
- Dodger Blue #1E90FF ΔE 0.057
- Soft Blue #6488EA ΔE 0.060
- Water Blue #0E87CC ΔE 0.064
- Faded Blue #658CBB ΔE 0.067
- Cool Blue #4984B8 ΔE 0.077
Use #399AE2 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.