#237AEC
Closest named color: Clear Blue (#247AFD). oklch(59.3% 0.19 257.4), rgb(35, 122, 236).
Aa
Black text reads best on this color (5.06:1).
About this color
#237AEC is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.190 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.026 away. Black text reads best on it, at 5.06:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.190) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.06:1 |
| White text | 4.14:1 |
Values
| HEX | #237AEC |
| RGB | rgb(35, 122, 236) |
| HSL | hsl(214, 84%, 53%) |
| OKLCH | oklch(59.3% 0.19 257.4) |
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 #237AEC | 4.14:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #237AEC | 5.06:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #237AEC text on white | 4.14:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #237AEC text on black | 5.06:1 | AA | Lc -33.7 | Non-text elements, placeholder text |
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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFB
oklch(93.7% 0.025 257.6)
-
Step 200
200
#C6DBF9
oklch(88.5% 0.047 257.3)
-
Step 300
300
#9EC3F8
oklch(80.9% 0.085 257.3)
-
Step 400
400
#67A2F5
oklch(70.8% 0.137 257.1)
-
Step 500
500
#3B87F1
oklch(63% 0.176 257.5)
-
Step 600
600 (this color)
#237AEC
oklch(59.3% 0.19 257.4)
-
Step 700
700
#015BC2
oklch(49% 0.177 257.5)
-
Step 800
800
#094B9D
oklch(42.7% 0.147 257.5)
-
Step 900
900
#13407D
oklch(37.8% 0.114 257.4)
-
Step 950
950
#0D2649
oklch(27.1% 0.072 257.4)
#237AEC 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) | #3586F0 | 0.035 |
| Deuteranopia (no green cones) | #0074EA | 0.021 |
| Tritanopia (no blue cones) | #0096A8 | 0.144 |
| Achromatopsia (no color) | #7D7D7D | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #237AEC
#237AEC
oklch(59.3% 0.19 257.4)
- #A77300
#A77300
oklch(59.4% 0.124 77.3)
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 #237AEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.026
- Cerulean Blue #056EEE ΔE 0.034
- Royal Blue #4169E1 ΔE 0.045
- Neon Blue #4361EE ΔE 0.060
- Bright Blue #0165FC ΔE 0.060
- Dodger Blue #1E90FF ΔE 0.061
- Dark Sky Blue #448EE4 ΔE 0.064
- Water Blue #0E87CC ΔE 0.065
Use #237AEC 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.