#37A5FA
Closest named color: Chefchaouen Blue (#4895EF). oklch(70% 0.158 246.5), rgb(55, 165, 250).
Aa
Black text reads best on this color (7.92:1).
About this color
#37A5FA is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.158 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.042 away. Black text reads best on it, at 7.92:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.92:1 |
| White text | 2.64:1 |
Values
| HEX | #37A5FA |
| RGB | rgb(55, 165, 250) |
| HSL | hsl(206, 95%, 60%) |
| OKLCH | oklch(70% 0.158 246.5) |
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 #37A5FA | 2.64:1 | Fails | Lc -56.3 | Large or bold text, headings |
| Black text on #37A5FA | 7.92:1 | AAA | Lc 52.9 | Large or bold text, headings |
| #37A5FA text on white | 2.64:1 | Fails | Lc 51.1 | Large or bold text, headings |
| #37A5FA text on black | 7.92:1 | AAA | Lc -50.8 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF7FE
oklch(97.2% 0.013 244.3)
-
Step 100
100
#DBECFC
oklch(93.5% 0.028 246.5)
-
Step 200
200
#BDDDFC
oklch(88.4% 0.055 247.6)
-
Step 300
300
#8BC7FD
oklch(80.9% 0.099 246.5)
-
Step 400
400 (this color)
#37A5FA
oklch(70% 0.158 246.5)
-
Step 500
500
#008FE6
oklch(63.1% 0.164 246.6)
-
Step 600
600
#0078C2
oklch(55.6% 0.145 246.5)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900
#004472
oklch(37.6% 0.099 246.8)
-
Step 950
950
#002846
oklch(26.9% 0.07 246.6)
#37A5FA 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) | #7DA9FE | 0.062 |
| Deuteranopia (no green cones) | #6197F8 | 0.044 |
| Tritanopia (no blue cones) | #00BAC4 | 0.113 |
| Achromatopsia (no color) | #9F9F9F | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37A5FA
#37A5FA
oklch(70% 0.158 246.5)
- #DE8800
#DE8800
oklch(70.1% 0.155 66.6)
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 #37A5FA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.042
- Cornflower Blue #6495ED ΔE 0.049
- Dodger Blue #1E90FF ΔE 0.061
- Dark Sky Blue #448EE4 ΔE 0.063
- Deep Sky Blue #00BFFF ΔE 0.069
- Soft Blue #6488EA ΔE 0.077
- Periwinkle Blue #8F99FB ΔE 0.084
- Carolina Blue #8AB8FE ΔE 0.094
Use #37A5FA 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.