#109EF5
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.5% 0.166 244.9), rgb(16, 158, 245).
Aa
Black text reads best on this color (7.23:1).
About this color
#109EF5 is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.166 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.031 away. Black text reads best on it, at 7.23:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.23:1 |
| White text | 2.90:1 |
Values
| HEX | #109EF5 |
| RGB | rgb(16, 158, 245) |
| HSL | hsl(203, 92%, 51%) |
| OKLCH | oklch(67.5% 0.166 244.9) |
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 #109EF5 | 2.90:1 | Fails | Lc -60.0 | Content text, not long reading |
| Black text on #109EF5 | 7.23:1 | AAA | Lc 49.3 | Large or bold text, headings |
| #109EF5 text on white | 2.90:1 | Fails | Lc 54.7 | Large or bold text, headings |
| #109EF5 text on black | 7.23:1 | AAA | Lc -47.1 | 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
#EEF7FE
oklch(97.1% 0.013 241)
-
Step 100
100
#DAEDFD
oklch(93.7% 0.03 243.4)
-
Step 200
200
#BADEFD
oklch(88.5% 0.057 244.5)
-
Step 300
300
#86C8FF
oklch(80.9% 0.103 244.7)
-
Step 400
400 (this color)
#109EF5
oklch(67.5% 0.166 244.9)
-
Step 500
500
#0090E2
oklch(63.1% 0.159 245)
-
Step 600
600
#0079BF
oklch(55.7% 0.14 245)
-
Step 700
700
#0065A1
oklch(49% 0.124 245.1)
-
Step 800
800
#005385
oklch(42.7% 0.107 244.8)
-
Step 900
900
#004570
oklch(37.7% 0.095 244.9)
-
Step 950
950
#002945
oklch(27.1% 0.068 244.5)
#109EF5 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) | #74A2F9 | 0.068 |
| Deuteranopia (no green cones) | #548FF3 | 0.048 |
| Tritanopia (no blue cones) | #00B3BE | 0.114 |
| Achromatopsia (no color) | #979797 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #109EF5
#109EF5
oklch(67.5% 0.166 244.9)
- #D58000
#D58000
oklch(67.6% 0.151 65.2)
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 #109EF5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.031
- Dodger Blue #1E90FF ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.046
- Cornflower Blue #6495ED ΔE 0.050
- Soft Blue #6488EA ΔE 0.069
- Water Blue #0E87CC ΔE 0.081
- Deep Sky Blue #00BFFF ΔE 0.089
- Clear Blue #247AFD ΔE 0.096
Use #109EF5 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.