#18A7DF
Closest named color: Turquoise Blue (#06B1C4). oklch(68.5% 0.136 232.3), rgb(24, 167, 223).
Aa
Black text reads best on this color (7.63:1).
About this color
#18A7DF is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.136 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.056 away. Black text reads best on it, at 7.63:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.63:1 |
| White text | 2.75:1 |
Values
| HEX | #18A7DF |
| RGB | rgb(24, 167, 223) |
| HSL | hsl(197, 81%, 48%) |
| OKLCH | oklch(68.5% 0.136 232.3) |
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 #18A7DF | 2.75:1 | Fails | Lc -57.8 | Large or bold text, headings |
| Black text on #18A7DF | 7.63:1 | AAA | Lc 51.4 | Large or bold text, headings |
| #18A7DF text on white | 2.75:1 | Fails | Lc 52.6 | Large or bold text, headings |
| #18A7DF text on black | 7.63:1 | AAA | Lc -49.3 | 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
#DAEDF8
oklch(93.5% 0.025 233)
-
Step 200
200
#BBDFF3
oklch(88.4% 0.047 232.3)
-
Step 300
300
#87CBEE
oklch(80.9% 0.085 231.6)
-
Step 400
400 (this color)
#18A7DF
oklch(68.5% 0.136 232.3)
-
Step 500
500
#0096CA
oklch(63.2% 0.129 232.1)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
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
#002B3D
oklch(27.1% 0.055 231.9)
#18A7DF 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) | #8BA5E2 | 0.088 |
| Deuteranopia (no green cones) | #7294DE | 0.074 |
| Tritanopia (no blue cones) | #00B6BA | 0.080 |
| Achromatopsia (no color) | #9C9C9C | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18A7DF
#18A7DF
oklch(68.5% 0.136 232.3)
- #DA7F42
#DA7F42
oklch(68.4% 0.136 52.2)
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 #18A7DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.056
- Chefchaouen Blue #4895EF ΔE 0.062
- Cornflower Blue #6495ED ΔE 0.071
- Dark Sky Blue #448EE4 ΔE 0.071
- Deep Sky Blue #00BFFF ΔE 0.072
- Greyblue #77A1B5 ΔE 0.082
- Faded Blue #658CBB ΔE 0.085
- Dodger Blue #1E90FF ΔE 0.086
Use #18A7DF 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.