#237397
Closest named color: Sea Blue (#047495). oklch(52.5% 0.094 232.4), rgb(35, 115, 151).
Aa
White text reads best on this color (5.28:1).
About this color
#237397 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.094 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.012 away. White text reads best on it, at 5.28:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.97:1 |
| White text | 5.28:1 |
Values
| HEX | #237397 |
| RGB | rgb(35, 115, 151) |
| HSL | hsl(199, 62%, 36%) |
| OKLCH | oklch(52.5% 0.094 232.4) |
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 #237397 | 5.28:1 | AA | Lc -81.3 | Fine for body text |
| Black text on #237397 | 3.97:1 | AA large text | Lc 28.1 | Dividers and decoration only |
| #237397 text on white | 5.28:1 | AA | Lc 76.0 | Fine for body text |
| #237397 text on black | 3.97:1 | AA large text | Lc -25.8 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE6
oklch(88.5% 0.023 233.4)
-
Step 300
300
#A6C6D8
oklch(80.9% 0.043 232.7)
-
Step 400
400
#75A8C4
oklch(70.6% 0.068 233)
-
Step 500
500
#4F93B5
oklch(63.2% 0.086 232.1)
-
Step 600
600 (this color)
#237397
oklch(52.5% 0.094 232.4)
-
Step 700
700
#20698A
oklch(49.2% 0.087 232.4)
-
Step 800
800
#1D5570
oklch(42.6% 0.073 233.2)
-
Step 900
900
#1F475A
oklch(37.8% 0.055 231.4)
-
Step 950
950
#132935
oklch(26.9% 0.036 234.1)
#237397 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) | #617299 | 0.061 |
| Deuteranopia (no green cones) | #516796 | 0.051 |
| Tritanopia (no blue cones) | #007D7F | 0.057 |
| Achromatopsia (no color) | #6C6C6C | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #237397
#237397
oklch(52.5% 0.094 232.4)
- #945A34
#945A34
oklch(52.5% 0.093 52.6)
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 #237397, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.012
- Ocean Blue #03719C ΔE 0.016
- Muted Blue #3B719F ΔE 0.024
- Ocean #017B92 ΔE 0.029
- Dull Blue #49759C ΔE 0.034
- Flat Blue #3C73A8 ΔE 0.035
- Cerulean #457B9D ΔE 0.039
- Metallic Blue #4F738E ΔE 0.039
Use #237397 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.