#228CA5
Closest named color: Teal Blue (#01889F). oklch(59.4% 0.098 218), rgb(34, 140, 165).
Aa
Black text reads best on this color (5.36:1).
About this color
#228CA5 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.098 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.018 away. Black text reads best on it, at 5.36:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.36:1 |
| White text | 3.91:1 |
Values
| HEX | #228CA5 |
| RGB | rgb(34, 140, 165) |
| HSL | hsl(191, 66%, 39%) |
| OKLCH | oklch(59.4% 0.098 218) |
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 #228CA5 | 3.91:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #228CA5 | 5.36:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #228CA5 text on white | 3.91:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #228CA5 text on black | 5.36:1 | AA | Lc -35.5 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0ECF0
oklch(93.5% 0.014 219.6)
-
Step 200
200
#C7DEE5
oklch(88.6% 0.026 218)
-
Step 300
300
#9FC9D5
oklch(81% 0.047 217.1)
-
Step 400
400
#66ACC0
oklch(70.6% 0.076 218.2)
-
Step 500
500 (this color)
#228CA5
oklch(59.4% 0.098 218)
-
Step 600
600
#00819A
oklch(55.7% 0.1 217.7)
-
Step 700
700
#006C82
oklch(49.1% 0.088 218.4)
-
Step 800
800
#00596B
oklch(42.8% 0.077 217.7)
-
Step 900
900
#094958
oklch(37.6% 0.064 218.6)
-
Step 950
950
#0A2B34
oklch(27% 0.041 219.4)
#228CA5 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) | #7C88A6 | 0.084 |
| Deuteranopia (no green cones) | #6B7BA5 | 0.076 |
| Tritanopia (no blue cones) | #009594 | 0.044 |
| Achromatopsia (no color) | #818181 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #228CA5
#228CA5
oklch(59.4% 0.098 218)
- #B06953
#B06953
oklch(59.4% 0.097 38)
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 #228CA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.018
- Blue NCS #118AB2 ΔE 0.023
- Teal Green #0A9396 ΔE 0.037
- Dark Cyan #008B8B ΔE 0.043
- Steel Blue #4682B4 ΔE 0.048
- Off Blue #5684AE ΔE 0.048
- Dusty Blue #5A86AD ΔE 0.048
- Cerulean #457B9D ΔE 0.050
Use #228CA5 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.