#33B7FB
Closest named color: Deep Sky Blue (#00BFFF). oklch(74% 0.147 237), rgb(51, 183, 251).
Aa
Black text reads best on this color (9.30:1).
About this color
#33B7FB is a medium-light, vivid blue. In OKLCH its lightness is 74%, its chroma 0.147 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.022 away. Black text reads best on it, at 9.30:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.30:1 |
| White text | 2.25:1 |
Values
| HEX | #33B7FB |
| RGB | rgb(51, 183, 251) |
| HSL | hsl(200, 96%, 59%) |
| OKLCH | oklch(74% 0.147 237) |
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 #33B7FB | 2.25:1 | Fails | Lc -48.8 | Large or bold text, headings |
| Black text on #33B7FB | 9.30:1 | AAA | Lc 59.9 | Large or bold text, headings |
| #33B7FB text on white | 2.25:1 | Fails | Lc 44.0 | Non-text elements, placeholder text |
| #33B7FB text on black | 9.30:1 | AAA | Lc -58.1 | 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
#DAEDFA
oklch(93.6% 0.027 237.6)
-
Step 200
200
#BADFF7
oklch(88.5% 0.051 236.6)
-
Step 300
300
#86CAF5
oklch(80.9% 0.092 237.2)
-
Step 400
400 (this color)
#33B7FB
oklch(74% 0.147 237)
-
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
#006895
oklch(49% 0.107 237)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#004767
oklch(37.7% 0.082 236.6)
-
Step 950
950
#002A3F
oklch(27% 0.059 236.5)
#33B7FB 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) | #96B7FE | 0.083 |
| Deuteranopia (no green cones) | #7BA4FA | 0.068 |
| Tritanopia (no blue cones) | #00C8CF | 0.092 |
| Achromatopsia (no color) | #ADADAD | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33B7FB
#33B7FB
oklch(74% 0.147 237)
- #EF9042
#EF9042
oklch(74% 0.147 56.8)
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 #33B7FB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.022
- Bright Sky Blue #02CCFE ΔE 0.056
- Vivid Sky Blue #4CC9F0 ΔE 0.060
- Carolina Blue #8AB8FE ΔE 0.070
- Lightblue #7BC8F6 ΔE 0.076
- Turquoise Blue #06B1C4 ΔE 0.084
- Sky #82CAFC ΔE 0.084
- Chefchaouen Blue #4895EF ΔE 0.089
Use #33B7FB 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.