#33A9EF
Closest named color: Chefchaouen Blue (#4895EF). oklch(70.2% 0.144 240.3), rgb(51, 169, 239).
Aa
Black text reads best on this color (8.06:1).
About this color
#33A9EF is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.144 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.054 away. Black text reads best on it, at 8.06:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 8.06:1 |
| White text | 2.60:1 |
Values
| HEX | #33A9EF |
| RGB | rgb(51, 169, 239) |
| HSL | hsl(202, 85%, 57%) |
| OKLCH | oklch(70.2% 0.144 240.3) |
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 #33A9EF | 2.60:1 | Fails | Lc -55.5 | Large or bold text, headings |
| Black text on #33A9EF | 8.06:1 | AAA | Lc 53.6 | Large or bold text, headings |
| #33A9EF text on white | 2.60:1 | Fails | Lc 50.4 | Large or bold text, headings |
| #33A9EF text on black | 8.06:1 | AAA | Lc -51.5 | 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
#DBEDFA
oklch(93.7% 0.026 239.1)
-
Step 200
200
#BCDEF7
oklch(88.4% 0.05 240)
-
Step 300
300
#8AC9F5
oklch(80.9% 0.09 239.8)
-
Step 400
400 (this color)
#33A9EF
oklch(70.2% 0.144 240.3)
-
Step 500
500
#0092D8
oklch(63% 0.146 240.6)
-
Step 600
600
#007BB6
oklch(55.6% 0.128 240.2)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00547F
oklch(42.6% 0.099 240.7)
-
Step 900
900
#00466B
oklch(37.7% 0.087 240.8)
-
Step 950
950
#002A41
oklch(27.1% 0.061 239)
#33A9EF 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) | #88AAF2 | 0.074 |
| Deuteranopia (no green cones) | #6E99EE | 0.057 |
| Tritanopia (no blue cones) | #00BBC2 | 0.096 |
| Achromatopsia (no color) | #A0A0A0 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33A9EF
#33A9EF
oklch(70.2% 0.144 240.3)
- #DF8731
#DF8731
oklch(70.3% 0.144 60.3)
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 #33A9EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.054
- Deep Sky Blue #00BFFF ΔE 0.058
- Cornflower Blue #6495ED ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.071
- Turquoise Blue #06B1C4 ΔE 0.076
- Dodger Blue #1E90FF ΔE 0.078
- Soft Blue #6488EA ΔE 0.089
- Carolina Blue #8AB8FE ΔE 0.091
Use #33A9EF 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.