#218FB0
Closest named color: Blue NCS (#118AB2). oklch(60.6% 0.105 223.6), rgb(33, 143, 176).
Aa
Black text reads best on this color (5.62:1).
About this color
#218FB0 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 61%, its chroma 0.105 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.018 away. Black text reads best on it, at 5.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.62:1 |
| White text | 3.73:1 |
Values
| HEX | #218FB0 |
| RGB | rgb(33, 143, 176) |
| HSL | hsl(194, 68%, 41%) |
| OKLCH | oklch(60.6% 0.105 223.6) |
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 #218FB0 | 3.73:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #218FB0 | 5.62:1 | AA | Lc 39.6 | Non-text elements, placeholder text |
| #218FB0 text on white | 3.73:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #218FB0 text on black | 5.62:1 | AA | Lc -37.2 | 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
#F1F7F9
oklch(97.2% 0.007 219.6)
-
Step 100
100
#E0ECF1
oklch(93.6% 0.015 224.5)
-
Step 200
200
#C6DEE7
oklch(88.6% 0.028 222.3)
-
Step 300
300
#9DC8D9
oklch(80.8% 0.051 224)
-
Step 400
400
#63ACC6
oklch(70.7% 0.082 223.2)
-
Step 500
500 (this color)
#218FB0
oklch(60.6% 0.105 223.6)
-
Step 600
600
#0080A0
oklch(55.7% 0.104 223.4)
-
Step 700
700
#006B87
oklch(49% 0.092 224)
-
Step 800
800
#00586F
oklch(42.7% 0.08 223.4)
-
Step 900
900
#05495C
oklch(37.7% 0.068 223.4)
-
Step 950
950
#082B36
oklch(27% 0.044 223.1)
#218FB0 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) | #7C8CB2 | 0.082 |
| Deuteranopia (no green cones) | #6A7EB0 | 0.073 |
| Tritanopia (no blue cones) | #00999A | 0.052 |
| Achromatopsia (no color) | #848484 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #218FB0
#218FB0
oklch(60.6% 0.105 223.6)
- #B66C4C
#B66C4C
oklch(60.6% 0.105 43.8)
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 #218FB0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.018
- Teal Blue #01889F ΔE 0.033
- Cool Blue #4984B8 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.044
- Dusty Blue #5A86AD ΔE 0.045
- Off Blue #5684AE ΔE 0.045
- Teal Green #0A9396 ΔE 0.047
- Water Blue #0E87CC ΔE 0.055
Use #218FB0 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.