#0099EB
Closest named color: Chefchaouen Blue (#4895EF). oklch(65.7% 0.161 243.6), rgb(0, 153, 235).
Aa
Black text reads best on this color (6.75:1).
About this color
#0099EB is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.161 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.030 away. Black text reads best on it, at 6.75:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.75:1 |
| White text | 3.10:1 |
Values
| HEX | #0099EB |
| RGB | rgb(0, 153, 235) |
| HSL | hsl(201, 100%, 46%) |
| OKLCH | oklch(65.7% 0.161 243.6) |
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 #0099EB | 3.10:1 | AA large text | Lc -62.7 | Content text, not long reading |
| Black text on #0099EB | 6.75:1 | AA | Lc 46.7 | Large or bold text, headings |
| #0099EB text on white | 3.10:1 | AA large text | Lc 57.3 | Large or bold text, headings |
| #0099EB text on black | 6.75:1 | AA | Lc -44.4 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF8
oklch(93.6% 0.022 243.8)
-
Step 200
200
#C1DDF4
oklch(88.4% 0.044 243)
-
Step 300
300
#95C7F0
oklch(80.9% 0.078 243.7)
-
Step 400
400
#52A8E9
oklch(70.6% 0.127 243.9)
-
Step 500
500 (this color)
#0099EB
oklch(65.7% 0.161 243.6)
-
Step 600
600
#007ABC
oklch(55.7% 0.136 243.3)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005383
oklch(42.6% 0.105 243.8)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950
#002944
oklch(27% 0.066 243.6)
#0099EB 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) | #719CEE | 0.069 |
| Deuteranopia (no green cones) | #528AE9 | 0.049 |
| Tritanopia (no blue cones) | #00ADB7 | 0.109 |
| Achromatopsia (no color) | #929292 | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0099EB
#0099EB
oklch(65.7% 0.161 243.6)
- #CF7A00
#CF7A00
oklch(65.8% 0.149 63.8)
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 #0099EB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.035
- Dodger Blue #1E90FF ΔE 0.042
- Cornflower Blue #6495ED ΔE 0.053
- Water Blue #0E87CC ΔE 0.062
- Soft Blue #6488EA ΔE 0.065
- Faded Blue #658CBB ΔE 0.084
- Cool Blue #4984B8 ΔE 0.086
Use #0099EB 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.