#399EC1
Closest named color: Turquoise Blue (#06B1C4). oklch(65.6% 0.105 225.1), rgb(57, 158, 193).
Aa
Black text reads best on this color (6.83:1).
About this color
#399EC1 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.105 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.054 away. Black text reads best on it, at 6.83:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 6.83:1 |
| White text | 3.07:1 |
Values
| HEX | #399EC1 |
| RGB | rgb(57, 158, 193) |
| HSL | hsl(195, 54%, 49%) |
| OKLCH | oklch(65.6% 0.105 225.1) |
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 #399EC1 | 3.07:1 | AA large text | Lc -62.7 | Content text, not long reading |
| Black text on #399EC1 | 6.83:1 | AA | Lc 46.7 | Large or bold text, headings |
| #399EC1 text on white | 3.07:1 | AA large text | Lc 57.3 | Large or bold text, headings |
| #399EC1 text on black | 6.83:1 | AA | Lc -44.5 | 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
#C6DEE7
oklch(88.6% 0.028 222.3)
-
Step 300
300
#9EC8DA
oklch(80.9% 0.051 225.9)
-
Step 400
400
#65ACC7
oklch(70.8% 0.081 224.6)
-
Step 500
500 (this color)
#399EC1
oklch(65.6% 0.105 225.1)
-
Step 600
600
#007FA2
oklch(55.5% 0.106 225.7)
-
Step 700
700
#006B88
oklch(49.1% 0.093 224.9)
-
Step 800
800
#005870
oklch(42.8% 0.081 224.4)
-
Step 900
900
#07495D
oklch(37.8% 0.068 224.9)
-
Step 950
950
#092B36
oklch(27.1% 0.043 223.5)
#399EC1 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) | #8B9BC3 | 0.081 |
| Deuteranopia (no green cones) | #788DC1 | 0.071 |
| Tritanopia (no blue cones) | #00A8A9 | 0.056 |
| Achromatopsia (no color) | #939393 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #399EC1
#399EC1
oklch(65.6% 0.105 225.1)
- #C67B59
#C67B59
oklch(65.5% 0.105 44.8)
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 #399EC1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.054
- Cadet Blue #5F9EA0 ΔE 0.055
- Faded Blue #658CBB ΔE 0.057
- Greyblue #77A1B5 ΔE 0.059
- Blue NCS #118AB2 ΔE 0.064
- Dusty Blue #5A86AD ΔE 0.068
- Silver Lake Blue #778DA9 ΔE 0.069
- Sea #3C9992 ΔE 0.070
Use #399EC1 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.