#37A1FA
Closest named color: Chefchaouen Blue (#4895EF). oklch(69.1% 0.162 248.3), rgb(55, 161, 250).
Aa
Black text reads best on this color (7.64:1).
About this color
#37A1FA is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.162 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.033 away. Black text reads best on it, at 7.64:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.64:1 |
| White text | 2.74:1 |
Values
| HEX | #37A1FA |
| RGB | rgb(55, 161, 250) |
| HSL | hsl(207, 95%, 60%) |
| OKLCH | oklch(69.1% 0.162 248.3) |
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 #37A1FA | 2.74:1 | Fails | Lc -57.9 | Large or bold text, headings |
| Black text on #37A1FA | 7.64:1 | AAA | Lc 51.4 | Large or bold text, headings |
| #37A1FA text on white | 2.74:1 | Fails | Lc 52.7 | Large or bold text, headings |
| #37A1FA text on black | 7.64:1 | AAA | Lc -49.2 | 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
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DBECFD
oklch(93.6% 0.029 248.1)
-
Step 200
200
#BDDDFD
oklch(88.5% 0.056 248.5)
-
Step 300
300
#8CC6FF
oklch(80.8% 0.101 248.7)
-
Step 400
400 (this color)
#37A1FA
oklch(69.1% 0.162 248.3)
-
Step 500
500
#008EEB
oklch(63.2% 0.171 248.3)
-
Step 600
600
#0077C6
oklch(55.6% 0.15 248.2)
-
Step 700
700
#0064A8
oklch(49.2% 0.133 248.3)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900
#004475
oklch(37.8% 0.103 248.3)
-
Step 950
950
#002848
oklch(27% 0.073 248.1)
#37A1FA 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) | #77A6FE | 0.057 |
| Deuteranopia (no green cones) | #5A94F8 | 0.038 |
| Tritanopia (no blue cones) | #00B6C2 | 0.116 |
| Achromatopsia (no color) | #9C9C9C | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37A1FA
#37A1FA
oklch(69.1% 0.162 248.3)
- #D78700
#D78700
oklch(69.1% 0.151 68.6)
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 #37A1FA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.033
- Cornflower Blue #6495ED ΔE 0.043
- Dodger Blue #1E90FF ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.054
- Soft Blue #6488EA ΔE 0.069
- Deep Sky Blue #00BFFF ΔE 0.079
- Periwinkle Blue #8F99FB ΔE 0.083
- Perrywinkle #8F8CE7 ΔE 0.094
Use #37A1FA 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.