#399DA0
Closest named color: Sea (#3C9992). oklch(64% 0.091 198), rgb(57, 157, 160).
Aa
Black text reads best on this color (6.50:1).
About this color
#399DA0 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.091 and its hue 198°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.021 away. Black text reads best on it, at 6.50:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.50:1 |
| White text | 3.22:1 |
Values
| HEX | #399DA0 |
| RGB | rgb(57, 157, 160) |
| HSL | hsl(182, 47%, 43%) |
| OKLCH | oklch(64% 0.091 198) |
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 #399DA0 | 3.22:1 | AA large text | Lc -64.7 | Content text, not long reading |
| Black text on #399DA0 | 6.50:1 | AA | Lc 44.8 | Non-text elements, placeholder text |
| #399DA0 text on white | 3.22:1 | AA large text | Lc 59.3 | Large or bold text, headings |
| #399DA0 text on black | 6.50:1 | AA | Lc -42.5 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1EDED
oklch(93.7% 0.013 196.9)
-
Step 200
200
#C7DEDF
oklch(88.4% 0.025 199.9)
-
Step 300
300
#A0CACB
oklch(80.9% 0.044 198.1)
-
Step 400
400
#68AFB0
oklch(70.8% 0.072 196.8)
-
Step 500
500 (this color)
#399DA0
oklch(64% 0.091 198)
-
Step 600
600
#008487
oklch(55.6% 0.095 197.6)
-
Step 700
700
#006F72
oklch(49.2% 0.084 198.1)
-
Step 800
800
#005B5D
oklch(42.7% 0.073 197.4)
-
Step 900
900
#0C4B4D
oklch(37.7% 0.059 198.2)
-
Step 950
950
#0B2C2D
oklch(27% 0.038 198)
#399DA0 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) | #9296A0 | 0.093 |
| Deuteranopia (no green cones) | #828AA1 | 0.087 |
| Tritanopia (no blue cones) | #00A29E | 0.023 |
| Achromatopsia (no color) | #8F8F8F | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #399DA0
#399DA0
oklch(64% 0.091 198)
- #BD7577
#BD7577
oklch(64% 0.091 18.1)
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 #399DA0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.021
- Persian Green #2A9D8F ΔE 0.029
- Cadet Blue #5F9EA0 ΔE 0.031
- Blue Green #0F9B8E ΔE 0.035
- Dull Teal #5F9E8F ΔE 0.038
- Teal Green #0A9396 ΔE 0.039
- Grey Teal #5E9B8A ΔE 0.039
- Dusty Teal #4C9085 ΔE 0.046
Use #399DA0 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.