#397E90
Closest named color: Cerulean (#457B9D). oklch(55.6% 0.074 217.5), rgb(57, 126, 144).
Aa
White text reads best on this color (4.60:1).
About this color
#397E90 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.074 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.028 away. White text reads best on it, at 4.60:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.56:1 |
| White text | 4.60:1 |
Values
| HEX | #397E90 |
| RGB | rgb(57, 126, 144) |
| HSL | hsl(192, 43%, 39%) |
| OKLCH | oklch(55.6% 0.074 217.5) |
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 #397E90 | 4.60:1 | AA | Lc -77.2 | Fine for body text |
| Black text on #397E90 | 4.56:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #397E90 text on white | 4.60:1 | AA | Lc 71.8 | Content text, not long reading |
| #397E90 text on black | 4.56:1 | AA | Lc -29.9 | Dividers and decoration only |
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 600.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECEE
oklch(93.7% 0.01 212.5)
-
Step 200
200
#CCDCE1
oklch(88.4% 0.019 218.4)
-
Step 300
300
#A9C6CF
oklch(80.8% 0.034 218.5)
-
Step 400
400
#7BA9B7
oklch(70.7% 0.053 218.6)
-
Step 500
500
#5694A5
oklch(63.1% 0.069 217.4)
-
Step 600
600 (this color)
#397E90
oklch(55.6% 0.074 217.5)
-
Step 700
700
#2A6A7A
oklch(49% 0.069 217.1)
-
Step 800
800
#255764
oklch(42.8% 0.057 217.4)
-
Step 900
900
#234751
oklch(37.5% 0.045 218)
-
Step 950
950
#162A30
oklch(27.1% 0.028 219)
#397E90 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) | #727B91 | 0.064 |
| Deuteranopia (no green cones) | #657190 | 0.058 |
| Tritanopia (no blue cones) | #008484 | 0.039 |
| Achromatopsia (no color) | #757575 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #397E90
#397E90
oklch(55.6% 0.074 217.5)
- #996454
#996454
oklch(55.6% 0.074 37.5)
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 #397E90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.028
- Ocean #017B92 ΔE 0.028
- Stormy Blue #507B9C ΔE 0.033
- Teal Blue #01889F ΔE 0.035
- Metallic Blue #4F738E ΔE 0.036
- Dull Blue #49759C ΔE 0.040
- Teal #008080 ΔE 0.040
- Deep Aqua #08787F ΔE 0.042
Use #397E90 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.