#237289
Closest named color: Sea Blue (#047495). oklch(51.5% 0.082 221.4), rgb(35, 114, 137).
Aa
White text reads best on this color (5.46:1).
About this color
#237289 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.082 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.020 away. White text reads best on it, at 5.46:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.83:1 |
| White text | 5.46:1 |
Values
| HEX | #237289 |
| RGB | rgb(35, 114, 137) |
| HSL | hsl(194, 59%, 34%) |
| OKLCH | oklch(51.5% 0.082 221.4) |
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 #237289 | 5.46:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #237289 | 3.83:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #237289 text on white | 5.46:1 | AA | Lc 77.0 | Fine for body text |
| #237289 text on black | 3.83:1 | AA large text | Lc -24.8 | 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 700.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CADDE4
oklch(88.5% 0.023 221.8)
-
Step 300
300
#A5C7D3
oklch(80.9% 0.04 221.2)
-
Step 400
400
#73AABD
oklch(70.7% 0.064 221.6)
-
Step 500
500
#4B95AC
oklch(63.1% 0.081 220.7)
-
Step 600
600
#287F98
oklch(55.7% 0.089 221.1)
-
Step 700
700 (this color)
#237289
oklch(51.5% 0.082 221.4)
-
Step 800
800
#195769
oklch(42.6% 0.068 221.3)
-
Step 900
900
#1C4856
oklch(37.7% 0.053 221.9)
-
Step 950
950
#122A32
oklch(26.9% 0.033 222)
#237289 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) | #646F8A | 0.066 |
| Deuteranopia (no green cones) | #566589 | 0.059 |
| Tritanopia (no blue cones) | #007979 | 0.041 |
| Achromatopsia (no color) | #696969 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #237289
#237289
oklch(51.5% 0.082 221.4)
- #8F5741
#8F5741
oklch(51.5% 0.082 42.1)
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 #237289, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.020
- Ocean #017B92 ΔE 0.027
- Deep Aqua #08787F ΔE 0.030
- Ocean Blue #03719C ΔE 0.033
- Deep Turquoise #017374 ΔE 0.039
- Metallic Blue #4F738E ΔE 0.041
- Bluegreen #017A79 ΔE 0.043
- Muted Blue #3B719F ΔE 0.043
Use #237289 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.