#18B2FD
Closest named color: Deep Sky Blue (#00BFFF). oklch(72.6% 0.158 238.4), rgb(24, 178, 253).
Aa
Black text reads best on this color (8.82:1).
About this color
#18B2FD is a medium-light, vivid blue. In OKLCH its lightness is 73%, its chroma 0.158 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.035 away. Black text reads best on it, at 8.82:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.82:1 |
| White text | 2.37:1 |
Values
| HEX | #18B2FD |
| RGB | rgb(24, 178, 253) |
| HSL | hsl(200, 98%, 54%) |
| OKLCH | oklch(72.6% 0.158 238.4) |
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 #18B2FD | 2.37:1 | Fails | Lc -51.2 | Large or bold text, headings |
| Black text on #18B2FD | 8.82:1 | AAA | Lc 57.7 | Large or bold text, headings |
| #18B2FD text on white | 2.37:1 | Fails | Lc 46.3 | Large or bold text, headings |
| #18B2FD text on black | 8.82:1 | AAA | Lc -55.8 | 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
#EEF7FD
oklch(97.1% 0.013 236.6)
-
Step 100
100
#D9EDFB
oklch(93.6% 0.028 238.2)
-
Step 200
200
#B9DFFA
oklch(88.5% 0.055 239.2)
-
Step 300
300
#82CAF9
oklch(80.9% 0.098 238.3)
-
Step 400
400 (this color)
#18B2FD
oklch(72.6% 0.158 238.4)
-
Step 500
500
#0093D4
oklch(63% 0.141 238.5)
-
Step 600
600
#007CB3
oklch(55.7% 0.124 238.2)
-
Step 700
700
#006897
oklch(49.1% 0.109 238.1)
-
Step 800
800
#00557D
oklch(42.7% 0.096 238.5)
-
Step 900
900
#004769
oklch(37.8% 0.084 238.3)
-
Step 950
950
#002A40
oklch(27% 0.06 237.8)
#18B2FD 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) | #8EB3FF | 0.085 |
| Deuteranopia (no green cones) | #709FFC | 0.067 |
| Tritanopia (no blue cones) | #00C5CC | 0.102 |
| Achromatopsia (no color) | #A8A8A8 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18B2FD
#18B2FD
oklch(72.6% 0.158 238.4)
- #EE8A2B
#EE8A2B
oklch(72.7% 0.158 58.4)
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 #18B2FD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.035
- Bright Sky Blue #02CCFE ΔE 0.072
- Chefchaouen Blue #4895EF ΔE 0.076
- Vivid Sky Blue #4CC9F0 ΔE 0.077
- Cornflower Blue #6495ED ΔE 0.080
- Carolina Blue #8AB8FE ΔE 0.083
- Turquoise Blue #06B1C4 ΔE 0.086
- Dodger Blue #1E90FF ΔE 0.092
Use #18B2FD 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.