#399CC0
Closest named color: Faded Blue (#658CBB). oklch(65.1% 0.104 226.2), rgb(57, 156, 192).
Aa
Black text reads best on this color (6.69:1).
About this color
#399CC0 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.104 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.053 away. Black text reads best on it, at 6.69:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.69:1 |
| White text | 3.13:1 |
Values
| HEX | #399CC0 |
| RGB | rgb(57, 156, 192) |
| HSL | hsl(196, 54%, 49%) |
| OKLCH | oklch(65.1% 0.104 226.2) |
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 #399CC0 | 3.13:1 | AA large text | Lc -63.5 | Content text, not long reading |
| Black text on #399CC0 | 6.69:1 | AA | Lc 45.9 | Large or bold text, headings |
| #399CC0 text on white | 3.13:1 | AA large text | Lc 58.1 | Large or bold text, headings |
| #399CC0 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF1
oklch(93.6% 0.015 224.5)
-
Step 200
200
#C6DDE8
oklch(88.4% 0.029 228.1)
-
Step 300
300
#9EC8DA
oklch(80.9% 0.051 225.9)
-
Step 400
400
#66ABC8
oklch(70.7% 0.082 227)
-
Step 500
500 (this color)
#399CC0
oklch(65.1% 0.104 226.2)
-
Step 600
600
#007FA3
oklch(55.6% 0.107 226.4)
-
Step 700
700
#006B89
oklch(49.1% 0.094 225.7)
-
Step 800
800
#005771
oklch(42.6% 0.082 226.6)
-
Step 900
900
#09495D
oklch(37.8% 0.068 225.2)
-
Step 950
950
#0A2B37
oklch(27.2% 0.043 226.1)
#399CC0 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) | #8899C2 | 0.078 |
| Deuteranopia (no green cones) | #768BC0 | 0.070 |
| Tritanopia (no blue cones) | #00A7A8 | 0.059 |
| Achromatopsia (no color) | #919191 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #399CC0
#399CC0
oklch(65.1% 0.104 226.2)
- #C47A57
#C47A57
oklch(65.1% 0.105 45.7)
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 #399CC0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.053
- Cadet Blue #5F9EA0 ΔE 0.056
- Turquoise Blue #06B1C4 ΔE 0.059
- Blue NCS #118AB2 ΔE 0.059
- Greyblue #77A1B5 ΔE 0.061
- Dusty Blue #5A86AD ΔE 0.063
- Cool Blue #4984B8 ΔE 0.066
- Off Blue #5684AE ΔE 0.067
Use #399CC0 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.