#108CD5
Closest named color: Water Blue (#0E87CC). oklch(61.6% 0.146 243.4), rgb(16, 140, 213).
Aa
Black text reads best on this color (5.73:1).
About this color
#108CD5 is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.146 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.018 away. Black text reads best on it, at 5.73:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.73:1 |
| White text | 3.66:1 |
Values
| HEX | #108CD5 |
| RGB | rgb(16, 140, 213) |
| HSL | hsl(202, 86%, 45%) |
| OKLCH | oklch(61.6% 0.146 243.4) |
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 #108CD5 | 3.66:1 | AA large text | Lc -69.1 | Content text, not long reading |
| Black text on #108CD5 | 5.73:1 | AA | Lc 40.5 | Non-text elements, placeholder text |
| #108CD5 text on white | 3.66:1 | AA large text | Lc 63.6 | Content text, not long reading |
| #108CD5 text on black | 5.73:1 | AA | Lc -38.1 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C4DDF2
oklch(88.6% 0.039 243.5)
-
Step 300
300
#99C7EC
oklch(81% 0.072 243)
-
Step 400
400
#5CA8E2
oklch(70.7% 0.114 243.5)
-
Step 500
500 (this color)
#108CD5
oklch(61.6% 0.146 243.4)
-
Step 600
600
#007ABC
oklch(55.7% 0.136 243.3)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005383
oklch(42.6% 0.105 243.8)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950
#052941
oklch(27% 0.06 243.1)
#108CD5 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) | #698FD8 | 0.064 |
| Deuteranopia (no green cones) | #4E7ED4 | 0.047 |
| Tritanopia (no blue cones) | #009EA6 | 0.100 |
| Achromatopsia (no color) | #868686 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #108CD5
#108CD5
oklch(61.6% 0.146 243.4)
- #BE6F00
#BE6F00
oklch(61.6% 0.14 63.5)
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 #108CD5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.018
- Dark Sky Blue #448EE4 ΔE 0.037
- Cool Blue #4984B8 ΔE 0.050
- Blue NCS #118AB2 ΔE 0.054
- Steel Blue #4682B4 ΔE 0.055
- Chefchaouen Blue #4895EF ΔE 0.056
- Windows Blue #3778BF ΔE 0.058
- Dodger Blue #1E90FF ΔE 0.064
Use #108CD5 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.