#33B4FD
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.4% 0.151 239.4), rgb(51, 180, 253).
Aa
Black text reads best on this color (9.08:1).
About this color
#33B4FD is a medium-light, vivid blue. In OKLCH its lightness is 73%, its chroma 0.151 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.029 away. Black text reads best on it, at 9.08:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.08:1 |
| White text | 2.31:1 |
Values
| HEX | #33B4FD |
| RGB | rgb(51, 180, 253) |
| HSL | hsl(202, 98%, 60%) |
| OKLCH | oklch(73.4% 0.151 239.4) |
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 #33B4FD | 2.31:1 | Fails | Lc -50.0 | Large or bold text, headings |
| Black text on #33B4FD | 9.08:1 | AAA | Lc 58.9 | Large or bold text, headings |
| #33B4FD text on white | 2.31:1 | Fails | Lc 45.1 | Large or bold text, headings |
| #33B4FD text on black | 9.08:1 | AAA | Lc -57.0 | 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
#EEF7FD
oklch(97.1% 0.013 236.6)
-
Step 100
100
#DAEDFB
oklch(93.6% 0.028 239.7)
-
Step 200
200
#BBDFF9
oklch(88.6% 0.052 239.6)
-
Step 300
300
#86C9F7
oklch(80.8% 0.094 239.5)
-
Step 400
400 (this color)
#33B4FD
oklch(73.4% 0.151 239.4)
-
Step 500
500
#0093D6
oklch(63.1% 0.143 239.3)
-
Step 600
600
#007BB5
oklch(55.6% 0.127 239.8)
-
Step 700
700
#006899
oklch(49.2% 0.111 239.3)
-
Step 800
800
#00557E
oklch(42.8% 0.097 239.2)
-
Step 900
900
#00466A
oklch(37.6% 0.086 240.1)
-
Step 950
950
#002A41
oklch(27.1% 0.061 239)
#33B4FD 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) | #91B5FF | 0.079 |
| Deuteranopia (no green cones) | #76A2FC | 0.063 |
| Tritanopia (no blue cones) | #00C6CE | 0.098 |
| Achromatopsia (no color) | #AAAAAA | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33B4FD
#33B4FD
oklch(73.4% 0.151 239.4)
- #ED8F37
#ED8F37
oklch(73.5% 0.15 59.4)
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 #33B4FD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.029
- Bright Sky Blue #02CCFE ΔE 0.065
- Vivid Sky Blue #4CC9F0 ΔE 0.069
- Carolina Blue #8AB8FE ΔE 0.072
- Chefchaouen Blue #4895EF ΔE 0.081
- Cornflower Blue #6495ED ΔE 0.082
- Lightblue #7BC8F6 ΔE 0.083
- Turquoise Blue #06B1C4 ΔE 0.087
Use #33B4FD 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.