#4BB1FD
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.4% 0.145 244.3), rgb(75, 177, 253).
Aa
Black text reads best on this color (9.00:1).
About this color
#4BB1FD is a medium-light, vivid blue. In OKLCH its lightness is 73%, its chroma 0.145 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.040 away. Black text reads best on it, at 9.00:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.00:1 |
| White text | 2.33:1 |
Values
| HEX | #4BB1FD |
| RGB | rgb(75, 177, 253) |
| HSL | hsl(206, 98%, 64%) |
| OKLCH | oklch(73.4% 0.145 244.3) |
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 #4BB1FD | 2.33:1 | Fails | Lc -50.5 | Large or bold text, headings |
| Black text on #4BB1FD | 9.00:1 | AAA | Lc 58.3 | Large or bold text, headings |
| #4BB1FD text on white | 2.33:1 | Fails | Lc 45.6 | Large or bold text, headings |
| #4BB1FD text on black | 9.00:1 | AAA | Lc -56.4 | 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
#EFF7FD
oklch(97.2% 0.012 239.9)
-
Step 100
100
#DCECFB
oklch(93.6% 0.027 246.3)
-
Step 200
200
#BEDEF9
oklch(88.6% 0.05 243.8)
-
Step 300
300
#8EC7F7
oklch(80.8% 0.09 244.7)
-
Step 400
400 (this color)
#4BB1FD
oklch(73.4% 0.145 244.3)
-
Step 500
500
#0090E0
oklch(63% 0.157 244.4)
-
Step 600
600
#0079BE
oklch(55.6% 0.139 244.6)
-
Step 700
700
#0066A0
oklch(49.2% 0.121 244)
-
Step 800
800
#005384
oklch(42.6% 0.106 244.3)
-
Step 900
900
#00456F
oklch(37.6% 0.093 244.3)
-
Step 950
950
#002944
oklch(27% 0.066 243.6)
#4BB1FD 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) | #8EB3FF | 0.064 |
| Deuteranopia (no green cones) | #76A2FC | 0.050 |
| Tritanopia (no blue cones) | #00C3CC | 0.103 |
| Achromatopsia (no color) | #AAAAAA | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4BB1FD
#4BB1FD
oklch(73.4% 0.145 244.3)
- #E79335
#E79335
oklch(73.4% 0.145 64.3)
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 #4BB1FD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.040
- Carolina Blue #8AB8FE ΔE 0.063
- Cornflower Blue #6495ED ΔE 0.073
- Bright Sky Blue #02CCFE ΔE 0.073
- Vivid Sky Blue #4CC9F0 ΔE 0.074
- Chefchaouen Blue #4895EF ΔE 0.075
- Lightblue #7BC8F6 ΔE 0.082
- Periwinkle Blue #8F99FB ΔE 0.084
Use #4BB1FD 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.