#218EDE
Closest named color: Dark Sky Blue (#448EE4). oklch(62.8% 0.152 246.7), rgb(33, 142, 222).
Aa
Black text reads best on this color (5.98:1).
About this color
#218EDE is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.152 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.023 away. Black text reads best on it, at 5.98:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.98:1 |
| White text | 3.50:1 |
Values
| HEX | #218EDE |
| RGB | rgb(33, 142, 222) |
| HSL | hsl(205, 74%, 50%) |
| OKLCH | oklch(62.8% 0.152 246.7) |
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 #218EDE | 3.50:1 | AA large text | Lc -67.6 | Content text, not long reading |
| Black text on #218EDE | 5.98:1 | AA | Lc 42.0 | Non-text elements, placeholder text |
| #218EDE text on white | 3.50:1 | AA large text | Lc 62.1 | Content text, not long reading |
| #218EDE text on black | 5.98:1 | AA | Lc -39.6 | 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
#DFECF8
oklch(93.7% 0.021 245.9)
-
Step 200
200
#C4DCF3
oklch(88.4% 0.041 247.1)
-
Step 300
300
#9AC6EE
oklch(80.9% 0.074 246.3)
-
Step 400
400
#5EA7E6
oklch(70.7% 0.118 246.5)
-
Step 500
500 (this color)
#218EDE
oklch(62.8% 0.152 246.7)
-
Step 600
600
#0078C2
oklch(55.6% 0.145 246.5)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900
#004472
oklch(37.6% 0.099 246.8)
-
Step 950
950
#062843
oklch(26.9% 0.063 247.1)
#218EDE 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) | #6892E1 | 0.058 |
| Deuteranopia (no green cones) | #4C81DC | 0.040 |
| Tritanopia (no blue cones) | #00A1AB | 0.107 |
| Achromatopsia (no color) | #898989 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #218EDE
#218EDE
oklch(62.8% 0.152 246.7)
- #BF7500
#BF7500
oklch(62.8% 0.139 67)
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 #218EDE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.023
- Water Blue #0E87CC ΔE 0.033
- Chefchaouen Blue #4895EF ΔE 0.041
- Dodger Blue #1E90FF ΔE 0.049
- Soft Blue #6488EA ΔE 0.056
- Cool Blue #4984B8 ΔE 0.060
- Cornflower Blue #6495ED ΔE 0.061
- Steel Blue #4682B4 ΔE 0.066
Use #218EDE 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.