#237091
Closest named color: Sea Blue (#047495). oklch(51.4% 0.089 230.9), rgb(35, 112, 145).
Aa
White text reads best on this color (5.52:1).
About this color
#237091 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.089 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.014 away. White text reads best on it, at 5.52:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.79:1 |
| White text | 5.52:1 |
Values
| HEX | #237091 |
| RGB | rgb(35, 112, 145) |
| HSL | hsl(198, 61%, 35%) |
| OKLCH | oklch(51.4% 0.089 230.9) |
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 #237091 | 5.52:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #237091 | 3.79:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #237091 text on white | 5.52:1 | AA | Lc 77.3 | Fine for body text |
| #237091 text on black | 3.79:1 | AA large text | Lc -24.5 | 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 700.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#CADCE6
oklch(88.4% 0.024 231.9)
-
Step 300
300
#A5C6D8
oklch(80.8% 0.044 231.9)
-
Step 400
400
#73A9C4
oklch(70.7% 0.069 230.7)
-
Step 500
500
#4B93B5
oklch(63.1% 0.088 230.9)
-
Step 600
600
#297DA1
oklch(55.6% 0.096 230.8)
-
Step 700
700 (this color)
#237091
oklch(51.4% 0.089 230.9)
-
Step 800
800
#195670
oklch(42.7% 0.074 230.7)
-
Step 900
900
#1C475B
oklch(37.7% 0.058 231.3)
-
Step 950
950
#122A35
oklch(27.1% 0.036 229.8)
#237091 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) | #5F6E93 | 0.060 |
| Deuteranopia (no green cones) | #506491 | 0.051 |
| Tritanopia (no blue cones) | #00797B | 0.053 |
| Achromatopsia (no color) | #696969 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #237091
#237091
oklch(51.4% 0.089 230.9)
- #905735
#905735
oklch(51.4% 0.09 50.5)
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 #237091, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.014
- Ocean Blue #03719C ΔE 0.019
- Muted Blue #3B719F ΔE 0.031
- Ocean #017B92 ΔE 0.033
- Peacock Blue #016795 ΔE 0.034
- Denim #3B638C ΔE 0.039
- Dull Blue #49759C ΔE 0.042
- Metallic Blue #4F738E ΔE 0.042
Use #237091 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.