#37ACEB
Closest named color: Deep Sky Blue (#00BFFF). oklch(70.8% 0.137 237.4), rgb(55, 172, 235).
Aa
Black text reads best on this color (8.26:1).
About this color
#37ACEB is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.137 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.052 away. Black text reads best on it, at 8.26:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.26:1 |
| White text | 2.54:1 |
Values
| HEX | #37ACEB |
| RGB | rgb(55, 172, 235) |
| HSL | hsl(201, 82%, 57%) |
| OKLCH | oklch(70.8% 0.137 237.4) |
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 #37ACEB | 2.54:1 | Fails | Lc -54.5 | Large or bold text, headings |
| Black text on #37ACEB | 8.26:1 | AAA | Lc 54.6 | Large or bold text, headings |
| #37ACEB text on white | 2.54:1 | Fails | Lc 49.4 | Large or bold text, headings |
| #37ACEB text on black | 8.26:1 | AAA | Lc -52.6 | 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
#EFF7FC
oklch(97.2% 0.011 234.8)
-
Step 100
100
#DBEDF9
oklch(93.6% 0.025 236.8)
-
Step 200
200
#BDDFF5
oklch(88.6% 0.047 236.5)
-
Step 300
300
#8BC9F1
oklch(80.8% 0.085 237.5)
-
Step 400
400 (this color)
#37ACEB
oklch(70.8% 0.137 237.4)
-
Step 500
500
#0094D2
oklch(63.2% 0.138 237.1)
-
Step 600
600
#007CB1
oklch(55.6% 0.122 237.2)
-
Step 700
700
#006896
oklch(49.1% 0.108 237.6)
-
Step 800
800
#00557C
oklch(42.7% 0.094 237.9)
-
Step 900
900
#004768
oklch(37.7% 0.083 237.5)
-
Step 950
950
#002A40
oklch(27% 0.06 237.8)
#37ACEB 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) | #8EACEE | 0.077 |
| Deuteranopia (no green cones) | #769BEA | 0.063 |
| Tritanopia (no blue cones) | #00BCC2 | 0.088 |
| Achromatopsia (no color) | #A2A2A2 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37ACEB
#37ACEB
oklch(70.8% 0.137 237.4)
- #E08941
#E08941
oklch(70.9% 0.137 57.4)
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 #37ACEB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.052
- Chefchaouen Blue #4895EF ΔE 0.064
- Cornflower Blue #6495ED ΔE 0.067
- Turquoise Blue #06B1C4 ΔE 0.067
- Dark Sky Blue #448EE4 ΔE 0.080
- Vivid Sky Blue #4CC9F0 ΔE 0.083
- Bright Sky Blue #02CCFE ΔE 0.085
- Greyblue #77A1B5 ΔE 0.086
Use #37ACEB 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.