#183CF0
Closest named color: Vibrant Blue (#0339F8). oklch(48.3% 0.265 265.6), rgb(24, 60, 240).
Aa
White text reads best on this color (7.13:1).
About this color
#183CF0 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.265 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Vibrant Blue (#0339F8), ΔE 0.015 away. White text reads best on it, at 7.13:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.265) |
| Temperature | cool |
| Nearest name | Vibrant Blue (#0339F8) |
| Black text | 2.94:1 |
| White text | 7.13:1 |
Values
| HEX | #183CF0 |
| RGB | rgb(24, 60, 240) |
| HSL | hsl(230, 88%, 52%) |
| OKLCH | oklch(48.3% 0.265 265.6) |
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 #183CF0 | 7.13:1 | AAA | Lc -88.3 | Fine for body text |
| Black text on #183CF0 | 2.94:1 | Fails | Lc 20.8 | Dividers and decoration only |
| #183CF0 text on white | 7.13:1 | AAA | Lc 83.3 | Fine for body text |
| #183CF0 text on black | 2.94:1 | Fails | Lc -18.7 | Dividers and decoration only |
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 700.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#739CFF
oklch(70.7% 0.152 265.7)
-
Step 500
500
#4F7FFF
oklch(63.1% 0.197 265.6)
-
Step 600
600
#2D5EFF
oklch(55.6% 0.244 265.5)
-
Step 700
700 (this color)
#183CF0
oklch(48.3% 0.265 265.6)
-
Step 800
800
#1537C4
oklch(42.7% 0.219 265.5)
-
Step 900
900
#15339A
oklch(37.7% 0.171 265.5)
-
Step 950
950
#0C205A
oklch(27.1% 0.107 265.2)
#183CF0 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) | #0062F5 | 0.075 |
| Deuteranopia (no green cones) | #004DED | 0.029 |
| Tritanopia (no blue cones) | #007394 | 0.201 |
| Achromatopsia (no color) | #585858 | 0.266 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #183CF0
#183CF0
oklch(48.3% 0.265 265.6)
- #775900
#775900
oklch(48.2% 0.099 85.7)
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 #183CF0, closest first.
No curated palette has a color within ΔE 0.04 of #183CF0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vibrant Blue #0339F8 ΔE 0.015
- Vivid Blue #152EFF ΔE 0.028
- Light Royal Blue #3A2EFE ΔE 0.036
- Rich Blue #021BF9 ΔE 0.044
- Electric Blue #0652FF ΔE 0.047
- Strong Blue #0C06F7 ΔE 0.054
- Primary Blue #0804F9 ΔE 0.055
- Blue #0000FF ΔE 0.058
Use #183CF0 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.