#218FEF
Closest named color: Dodger Blue (#1E90FF). oklch(64% 0.171 250.7), rgb(33, 143, 239).
Aa
Black text reads best on this color (6.24:1).
About this color
#218FEF is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.171 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.024 away. Black text reads best on it, at 6.24:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.24:1 |
| White text | 3.36:1 |
Values
| HEX | #218FEF |
| RGB | rgb(33, 143, 239) |
| HSL | hsl(208, 87%, 53%) |
| OKLCH | oklch(64% 0.171 250.7) |
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 #218FEF | 3.36:1 | AA large text | Lc -66.0 | Content text, not long reading |
| Black text on #218FEF | 6.24:1 | AA | Lc 43.5 | Non-text elements, placeholder text |
| #218FEF text on white | 3.36:1 | AA large text | Lc 60.5 | Content text, not long reading |
| #218FEF text on black | 6.24:1 | AA | Lc -41.2 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEEBFA
oklch(93.5% 0.025 251.9)
-
Step 200
200
#C3DCF8
oklch(88.5% 0.047 251.3)
-
Step 300
300
#98C5F5
oklch(80.9% 0.083 250.5)
-
Step 400
400
#5BA5F1
oklch(70.7% 0.134 250.8)
-
Step 500
500 (this color)
#218FEF
oklch(64% 0.171 250.7)
-
Step 600
600
#0075CC
oklch(55.6% 0.16 250.6)
-
Step 700
700
#0062AD
oklch(49.1% 0.142 250.8)
-
Step 800
800
#00508F
oklch(42.6% 0.123 250.8)
-
Step 900
900
#004378
oklch(37.8% 0.108 250.3)
-
Step 950
950
#052747
oklch(26.9% 0.071 251)
#218FEF 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) | #5F96F3 | 0.051 |
| Deuteranopia (no green cones) | #3C84ED | 0.029 |
| Tritanopia (no blue cones) | #00A6B3 | 0.125 |
| Achromatopsia (no color) | #8C8C8C | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #218FEF
#218FEF
oklch(64% 0.171 250.7)
- #C07B00
#C07B00
oklch(64% 0.138 70.6)
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 #218FEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.024
- Dark Sky Blue #448EE4 ΔE 0.024
- Chefchaouen Blue #4895EF ΔE 0.030
- Soft Blue #6488EA ΔE 0.050
- Cornflower Blue #6495ED ΔE 0.054
- Water Blue #0E87CC ΔE 0.056
- Clear Blue #247AFD ΔE 0.060
- Cornflower #6A79F7 ΔE 0.077
Use #218FEF 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.