#397D91
Closest named color: Cerulean (#457B9D). oklch(55.4% 0.075 219.9), rgb(57, 125, 145).
Aa
White text reads best on this color (4.64:1).
About this color
#397D91 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.075 and its hue 220°. 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 4.64:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.51:1 |
| White text | 4.64:1 |
Values
| HEX | #397D91 |
| RGB | rgb(57, 125, 145) |
| HSL | hsl(194, 44%, 40%) |
| OKLCH | oklch(55.4% 0.075 219.9) |
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 #397D91 | 4.64:1 | AA | Lc -77.6 | Fine for body text |
| Black text on #397D91 | 4.51:1 | AA | Lc 32.0 | Non-text elements, placeholder text |
| #397D91 text on white | 4.64:1 | AA | Lc 72.1 | Content text, not long reading |
| #397D91 text on black | 4.51:1 | AA | Lc -29.6 | 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
#CCDCE2
oklch(88.4% 0.019 222.2)
-
Step 300
300
#AAC6D0
oklch(80.9% 0.033 221.4)
-
Step 400
400
#7BA9B8
oklch(70.7% 0.054 220)
-
Step 500
500
#5794A6
oklch(63.2% 0.069 218.9)
-
Step 600
600 (this color)
#397D91
oklch(55.4% 0.075 219.9)
-
Step 700
700
#2B6A7C
oklch(49.1% 0.07 219.7)
-
Step 800
800
#255665
oklch(42.6% 0.058 220.8)
-
Step 900
900
#244752
oklch(37.6% 0.045 220.5)
-
Step 950
950
#162A30
oklch(27.1% 0.028 219)
#397D91 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) | #717A92 | 0.063 |
| Deuteranopia (no green cones) | #647091 | 0.057 |
| Tritanopia (no blue cones) | #008483 | 0.043 |
| Achromatopsia (no color) | #747474 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #397D91
#397D91
oklch(55.4% 0.075 219.9)
- #996451
#996451
oklch(55.5% 0.075 40.5)
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 #397D91, 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 0.027
- Stormy Blue #507B9C ΔE 0.031
- Metallic Blue #4F738E ΔE 0.033
- Teal Blue #01889F ΔE 0.036
- Dull Blue #49759C ΔE 0.036
- Teal #008080 ΔE 0.042
- Sea Blue #047495 ΔE 0.042
Use #397D91 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.