#218ECC
Closest named color: Water Blue (#0E87CC). oklch(61.8% 0.131 240.2), rgb(33, 142, 204).
Aa
Black text reads best on this color (5.80:1).
About this color
#218ECC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.131 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.022 away. Black text reads best on it, at 5.80:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.80:1 |
| White text | 3.61:1 |
Values
| HEX | #218ECC |
| RGB | rgb(33, 142, 204) |
| HSL | hsl(202, 72%, 46%) |
| OKLCH | oklch(61.8% 0.131 240.2) |
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 #218ECC | 3.61:1 | AA large text | Lc -68.8 | Content text, not long reading |
| Black text on #218ECC | 5.80:1 | AA | Lc 40.8 | Non-text elements, placeholder text |
| #218ECC text on white | 3.61:1 | AA large text | Lc 63.3 | Content text, not long reading |
| #218ECC text on black | 5.80:1 | AA | Lc -38.4 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C5DDEF
oklch(88.5% 0.036 240.3)
-
Step 300
300
#9BC7E6
oklch(80.9% 0.064 239.3)
-
Step 400
400
#60A9DA
oklch(70.7% 0.103 239.8)
-
Step 500
500 (this color)
#218ECC
oklch(61.8% 0.131 240.2)
-
Step 600
600
#007BB6
oklch(55.6% 0.128 240.2)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00547F
oklch(42.6% 0.099 240.7)
-
Step 900
900
#02466A
oklch(37.6% 0.086 240.5)
-
Step 950
950
#07293E
oklch(26.9% 0.055 240.7)
#218ECC 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) | #708FCF | 0.066 |
| Deuteranopia (no green cones) | #5980CB | 0.051 |
| Tritanopia (no blue cones) | #009EA4 | 0.088 |
| Achromatopsia (no color) | #868686 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #218ECC
#218ECC
oklch(61.8% 0.131 240.2)
- #BE7021
#BE7021
oklch(61.9% 0.132 60.3)
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 #218ECC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.022
- Cool Blue #4984B8 ΔE 0.040
- Blue NCS #118AB2 ΔE 0.041
- Dark Sky Blue #448EE4 ΔE 0.044
- Steel Blue #4682B4 ΔE 0.045
- Off Blue #5684AE ΔE 0.055
- Faded Blue #658CBB ΔE 0.055
- Dusty Blue #5A86AD ΔE 0.057
Use #218ECC 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.