#217EE0
Closest named color: Water Blue (#0E87CC). oklch(59.3% 0.171 253.9), rgb(33, 126, 224).
Aa
Black text reads best on this color (5.12:1).
About this color
#217EE0 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.171 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.043 away. Black text reads best on it, at 5.12:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.12:1 |
| White text | 4.09:1 |
Values
| HEX | #217EE0 |
| RGB | rgb(33, 126, 224) |
| HSL | hsl(211, 75%, 50%) |
| OKLCH | oklch(59.3% 0.171 253.9) |
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 #217EE0 | 4.09:1 | AA large text | Lc -73.1 | Content text, not long reading |
| Black text on #217EE0 | 5.12:1 | AA | Lc 36.5 | Non-text elements, placeholder text |
| #217EE0 text on white | 4.09:1 | AA large text | Lc 67.6 | Content text, not long reading |
| #217EE0 text on black | 5.12:1 | AA | Lc -34.1 | 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 600.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DBF5
oklch(88.4% 0.042 253.8)
-
Step 300
300
#9FC4F2
oklch(81% 0.077 254.1)
-
Step 400
400
#68A4EB
oklch(70.8% 0.122 253.5)
-
Step 500
500
#3B8BE5
oklch(63.1% 0.156 253.7)
-
Step 600
600 (this color)
#217EE0
oklch(59.3% 0.171 253.9)
-
Step 700
700
#0060B6
oklch(49.2% 0.156 253.8)
-
Step 800
800
#064E94
oklch(42.6% 0.132 254)
-
Step 900
900
#124276
oklch(37.7% 0.102 253.7)
-
Step 950
950
#0D2745
oklch(27% 0.064 254)
#217EE0 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) | #4A86E4 | 0.039 |
| Deuteranopia (no green cones) | #2176DE | 0.021 |
| Tritanopia (no blue cones) | #0096A4 | 0.128 |
| Achromatopsia (no color) | #7D7D7D | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #217EE0
#217EE0
oklch(59.3% 0.171 253.9)
- #AA7100
#AA7100
oklch(59.4% 0.126 74.1)
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 #217EE0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.043
- Clear Blue #247AFD ΔE 0.046
- Cerulean Blue #056EEE ΔE 0.050
- Windows Blue #3778BF ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.052
- Royal Blue #4169E1 ΔE 0.054
- Dodger Blue #1E90FF ΔE 0.062
- Soft Blue #6488EA ΔE 0.067
Use #217EE0 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.