#237299
Closest named color: Ocean Blue (#03719C). oklch(52.3% 0.096 234.8), rgb(35, 114, 153).
Aa
White text reads best on this color (5.33:1).
About this color
#237299 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.096 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean Blue (#03719C), ΔE 0.013 away. White text reads best on it, at 5.33:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Ocean Blue (#03719C) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #237299 |
| RGB | rgb(35, 114, 153) |
| HSL | hsl(200, 63%, 37%) |
| OKLCH | oklch(52.3% 0.096 234.8) |
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 #237299 | 5.33:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #237299 | 3.93:1 | AA large text | Lc 27.9 | Dividers and decoration only |
| #237299 text on white | 5.33:1 | AA | Lc 76.2 | Fine for body text |
| #237299 text on black | 3.93:1 | AA large text | Lc -25.5 | 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
#E2ECF2
oklch(93.7% 0.013 233.7)
-
Step 200
200
#CADCE8
oklch(88.5% 0.025 236.9)
-
Step 300
300
#A4C6DB
oklch(80.9% 0.047 235.3)
-
Step 400
400
#72A9C9
oklch(70.8% 0.074 234.8)
-
Step 500
500
#4993BB
oklch(63.2% 0.095 234.7)
-
Step 600
600
#257CA7
oklch(55.6% 0.104 235.1)
-
Step 700
700 (this color)
#237299
oklch(52.3% 0.096 234.8)
-
Step 800
800
#165574
oklch(42.6% 0.08 235.1)
-
Step 900
900
#1B475E
oklch(37.8% 0.062 234.6)
-
Step 950
950
#112937
oklch(26.9% 0.04 236.4)
#237299 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) | #5F719B | 0.059 |
| Deuteranopia (no green cones) | #4F6698 | 0.049 |
| Tritanopia (no blue cones) | #007C7F | 0.060 |
| Achromatopsia (no color) | #6B6B6B | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #237299
#237299
oklch(52.3% 0.096 234.8)
- #94592F
#94592F
oklch(52.2% 0.096 54.2)
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 #237299, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean Blue #03719C ΔE 0.013
- Sea Blue #047495 ΔE 0.015
- Muted Blue #3B719F ΔE 0.021
- Flat Blue #3C73A8 ΔE 0.032
- Ocean #017B92 ΔE 0.033
- Dull Blue #49759C ΔE 0.035
- Peacock Blue #016795 ΔE 0.038
- Nice Blue #107AB0 ΔE 0.038
Use #237299 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.