#399BC8
Closest named color: Faded Blue (#658CBB). oklch(65.2% 0.112 232.2), rgb(57, 155, 200).
Aa
Black text reads best on this color (6.69:1).
About this color
#399BC8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.112 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.050 away. Black text reads best on it, at 6.69:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.69:1 |
| White text | 3.13:1 |
Values
| HEX | #399BC8 |
| RGB | rgb(57, 155, 200) |
| HSL | hsl(199, 57%, 50%) |
| OKLCH | oklch(65.2% 0.112 232.2) |
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 #399BC8 | 3.13:1 | AA large text | Lc -63.5 | Content text, not long reading |
| Black text on #399BC8 | 6.69:1 | AA | Lc 46.0 | Large or bold text, headings |
| #399BC8 text on white | 3.13:1 | AA large text | Lc 58.1 | Large or bold text, headings |
| #399BC8 text on black | 6.69:1 | AA | Lc -43.6 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C6DDEA
oklch(88.4% 0.03 232.5)
-
Step 300
300
#9EC7DE
oklch(80.8% 0.054 232.9)
-
Step 400
400
#65AACE
oklch(70.6% 0.088 232.6)
-
Step 500
500 (this color)
#399BC8
oklch(65.2% 0.112 232.2)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
Step 700
700
#006A90
oklch(49.2% 0.1 232)
-
Step 800
800
#005676
oklch(42.6% 0.087 232.3)
-
Step 900
900
#094861
oklch(37.8% 0.072 231.3)
-
Step 950
950
#0A2A39
oklch(27% 0.046 232.6)
#399BC8 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) | #8599CA | 0.074 |
| Deuteranopia (no green cones) | #718BC7 | 0.063 |
| Tritanopia (no blue cones) | #00A7AA | 0.068 |
| Achromatopsia (no color) | #919191 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #399BC8
#399BC8
oklch(65.2% 0.112 232.2)
- #C57B4C
#C57B4C
oklch(65.2% 0.112 52.1)
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 #399BC8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.050
- Blue NCS #118AB2 ΔE 0.060
- Dark Sky Blue #448EE4 ΔE 0.063
- Cool Blue #4984B8 ΔE 0.063
- Dusty Blue #5A86AD ΔE 0.063
- Water Blue #0E87CC ΔE 0.065
- Turquoise Blue #06B1C4 ΔE 0.065
- Greyblue #77A1B5 ΔE 0.067
Use #399BC8 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.