#397B90
Closest named color: Cerulean (#457B9D). oklch(54.9% 0.074 221.6), rgb(57, 123, 144).
Aa
White text reads best on this color (4.76:1).
About this color
#397B90 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.074 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.025 away. White text reads best on it, at 4.76:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.40:1 |
| White text | 4.76:1 |
Values
| HEX | #397B90 |
| RGB | rgb(57, 123, 144) |
| HSL | hsl(194, 43%, 39%) |
| OKLCH | oklch(54.9% 0.074 221.6) |
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 #397B90 | 4.76:1 | AA | Lc -78.3 | Fine for body text |
| Black text on #397B90 | 4.40:1 | AA large text | Lc 31.2 | Non-text elements, placeholder text |
| #397B90 text on white | 4.76:1 | AA | Lc 72.9 | Content text, not long reading |
| #397B90 text on black | 4.40:1 | AA large text | Lc -28.8 | 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
#E3EBEE
oklch(93.5% 0.009 222.1)
-
Step 200
200
#CDDCE2
oklch(88.5% 0.018 223.6)
-
Step 300
300
#AAC6D0
oklch(80.9% 0.033 221.4)
-
Step 400
400
#7CA9B8
oklch(70.8% 0.053 220.5)
-
Step 500
500
#5893A7
oklch(63.1% 0.068 221.8)
-
Step 600
600 (this color)
#397B90
oklch(54.9% 0.074 221.6)
-
Step 700
700
#2D6A7D
oklch(49.3% 0.069 221.4)
-
Step 800
800
#275665
oklch(42.7% 0.057 221.5)
-
Step 900
900
#254752
oklch(37.7% 0.044 221)
-
Step 950
950
#162A30
oklch(27.1% 0.028 219)
#397B90 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) | #6F7891 | 0.062 |
| Deuteranopia (no green cones) | #626F90 | 0.054 |
| Tritanopia (no blue cones) | #008282 | 0.043 |
| Achromatopsia (no color) | #737373 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #397B90
#397B90
oklch(54.9% 0.074 221.6)
- #96624F
#96624F
oklch(54.8% 0.074 40.8)
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 #397B90, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.025
- Ocean #017B92 ΔE 0.025
- Metallic Blue #4F738E ΔE 0.029
- Stormy Blue #507B9C ΔE 0.031
- Dull Blue #49759C ΔE 0.033
- Sea Blue #047495 ΔE 0.038
- Deep Aqua #08787F ΔE 0.040
- Teal Blue #01889F ΔE 0.041
Use #397B90 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.