#399B97
Closest named color: Sea (#3C9992). oklch(63.2% 0.09 191.3), rgb(57, 155, 151).
Aa
Black text reads best on this color (6.30:1).
About this color
#399B97 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.090 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.008 away. Black text reads best on it, at 6.30:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.30:1 |
| White text | 3.32:1 |
Values
| HEX | #399B97 |
| RGB | rgb(57, 155, 151) |
| HSL | hsl(178, 46%, 42%) |
| OKLCH | oklch(63.2% 0.09 191.3) |
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 #399B97 | 3.32:1 | AA large text | Lc -65.9 | Content text, not long reading |
| Black text on #399B97 | 6.30:1 | AA | Lc 43.6 | Non-text elements, placeholder text |
| #399B97 text on white | 3.32:1 | AA large text | Lc 60.4 | Content text, not long reading |
| #399B97 text on black | 6.30:1 | AA | Lc -41.3 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E1EDEC
oklch(93.7% 0.013 190.9)
-
Step 200
200
#C8DFDD
oklch(88.6% 0.025 190.4)
-
Step 300
300
#A1CAC7
oklch(80.9% 0.044 190.8)
-
Step 400
400
#6AAFAB
oklch(70.7% 0.07 190.9)
-
Step 500
500 (this color)
#399B97
oklch(63.2% 0.09 191.3)
-
Step 600
600
#008581
oklch(55.7% 0.096 191.1)
-
Step 700
700
#00706C
oklch(49.2% 0.085 190.4)
-
Step 800
800
#005B59
oklch(42.6% 0.073 192.2)
-
Step 900
900
#0F4B49
oklch(37.6% 0.058 191.6)
-
Step 950
950
#0C2C2B
oklch(26.9% 0.037 192.3)
#399B97 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) | #929397 | 0.095 |
| Deuteranopia (no green cones) | #838898 | 0.090 |
| Tritanopia (no blue cones) | #009F9A | 0.019 |
| Achromatopsia (no color) | #8D8D8D | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #399B97
#399B97
oklch(63.2% 0.09 191.3)
- #B9727C
#B9727C
oklch(63.1% 0.09 10.8)
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 #399B97, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.008
- Persian Green #2A9D8F ΔE 0.018
- Blue Green #0F9B8E ΔE 0.024
- Teal Green #0A9396 ΔE 0.033
- Grey Teal #5E9B8A ΔE 0.033
- Dusty Teal #4C9085 ΔE 0.035
- Dull Teal #5F9E8F ΔE 0.035
- Cadet Blue #5F9EA0 ΔE 0.037
Use #399B97 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.