#237187
Closest named color: Sea Blue (#047495). oklch(51.2% 0.081 220.7), rgb(35, 113, 135).
Aa
White text reads best on this color (5.55:1).
About this color
#237187 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.081 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.023 away. White text reads best on it, at 5.55:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.78:1 |
| White text | 5.55:1 |
Values
| HEX | #237187 |
| RGB | rgb(35, 113, 135) |
| HSL | hsl(193, 59%, 33%) |
| OKLCH | oklch(51.2% 0.081 220.7) |
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 #237187 | 5.55:1 | AA | Lc -82.7 | Fine for body text |
| Black text on #237187 | 3.78:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #237187 text on white | 5.55:1 | AA | Lc 77.4 | Fine for body text |
| #237187 text on black | 3.78:1 | AA large text | Lc -24.3 | 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
#CADDE3
oklch(88.5% 0.022 218.6)
-
Step 300
300
#A6C7D2
oklch(80.9% 0.039 220)
-
Step 400
400
#74AABC
oklch(70.7% 0.062 220.8)
-
Step 500
500
#4C95AB
oklch(63.1% 0.08 220)
-
Step 600
600
#2A7F97
oklch(55.7% 0.087 220.5)
-
Step 700
700 (this color)
#237187
oklch(51.2% 0.081 220.7)
-
Step 800
800
#1A5769
oklch(42.7% 0.067 221.5)
-
Step 900
900
#1D4855
oklch(37.7% 0.052 220.6)
-
Step 950
950
#122A32
oklch(26.9% 0.033 222)
#237187 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) | #646E88 | 0.067 |
| Deuteranopia (no green cones) | #566487 | 0.059 |
| Tritanopia (no blue cones) | #007878 | 0.039 |
| Achromatopsia (no color) | #686868 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #237187
#237187
oklch(51.2% 0.081 220.7)
- #8E5642
#8E5642
oklch(51.2% 0.081 40.4)
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 #237187, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.023
- Deep Aqua #08787F ΔE 0.030
- Ocean #017B92 ΔE 0.030
- Ocean Blue #03719C ΔE 0.035
- Deep Turquoise #017374 ΔE 0.037
- Dark Aquamarine #017371 ΔE 0.042
- Bluegreen #017A79 ΔE 0.042
- Metallic Blue #4F738E ΔE 0.043
Use #237187 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.