#18A4DA
Closest named color: Turquoise Blue (#06B1C4). oklch(67.6% 0.133 231.8), rgb(24, 164, 218).
Aa
Black text reads best on this color (7.36:1).
About this color
#18A4DA is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.133 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.057 away. Black text reads best on it, at 7.36:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.36:1 |
| White text | 2.85:1 |
Values
| HEX | #18A4DA |
| RGB | rgb(24, 164, 218) |
| HSL | hsl(197, 80%, 47%) |
| OKLCH | oklch(67.6% 0.133 231.8) |
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 #18A4DA | 2.85:1 | Fails | Lc -59.4 | Large or bold text, headings |
| Black text on #18A4DA | 7.36:1 | AAA | Lc 49.9 | Large or bold text, headings |
| #18A4DA text on white | 2.85:1 | Fails | Lc 54.1 | Large or bold text, headings |
| #18A4DA text on black | 7.36:1 | AAA | Lc -47.7 | Large or bold text, headings |
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 400.
-
Step 50
50
#EEF7FC
oklch(97.1% 0.012 231.7)
-
Step 100
100
#DBEDF7
oklch(93.6% 0.023 231.8)
-
Step 200
200
#BCDFF3
oklch(88.5% 0.046 233.1)
-
Step 300
300
#88CBED
oklch(81% 0.083 231.2)
-
Step 400
400 (this color)
#18A4DA
oklch(67.6% 0.133 231.8)
-
Step 500
500
#0096C9
oklch(63.2% 0.128 231.5)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
Step 700
700
#006A8F
oklch(49.2% 0.1 231.3)
-
Step 800
800
#005676
oklch(42.6% 0.087 232.3)
-
Step 900
900
#004863
oklch(37.7% 0.077 231.8)
-
Step 950
950
#002B3C
oklch(27.1% 0.054 230.4)
#18A4DA 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) | #89A2DD | 0.087 |
| Deuteranopia (no green cones) | #7092D9 | 0.072 |
| Tritanopia (no blue cones) | #00B3B6 | 0.079 |
| Achromatopsia (no color) | #999999 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18A4DA
#18A4DA
oklch(67.6% 0.133 231.8)
- #D67D42
#D67D42
oklch(67.6% 0.133 52.1)
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 #18A4DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.057
- Chefchaouen Blue #4895EF ΔE 0.061
- Dark Sky Blue #448EE4 ΔE 0.067
- Cornflower Blue #6495ED ΔE 0.070
- Faded Blue #658CBB ΔE 0.078
- Greyblue #77A1B5 ΔE 0.079
- Water Blue #0E87CC ΔE 0.082
- Deep Sky Blue #00BFFF ΔE 0.082
Use #18A4DA 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.