#3143AF
Closest named color: Sapphire (#2138AB). oklch(43.8% 0.172 270.3), rgb(49, 67, 175).
Aa
White text reads best on this color (8.22:1).
About this color
#3143AF is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.172 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.035 away. White text reads best on it, at 8.22:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.55:1 |
| White text | 8.22:1 |
Values
| HEX | #3143AF |
| RGB | rgb(49, 67, 175) |
| HSL | hsl(231, 56%, 44%) |
| OKLCH | oklch(43.8% 0.172 270.3) |
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 #3143AF | 8.22:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #3143AF | 2.55:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #3143AF text on white | 8.22:1 | AAA | Lc 87.9 | Fine for body text |
| #3143AF text on black | 2.55:1 | Fails | Lc -14.3 | Not readable |
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 800.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FE
oklch(93.5% 0.029 271.1)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7D99FF
oklch(70.7% 0.152 270.5)
-
Step 500
500
#5E7BFF
oklch(63.1% 0.198 270.4)
-
Step 600
600
#465EF3
oklch(55.6% 0.223 270.3)
-
Step 700
700
#394CD4
oklch(49.2% 0.208 270.4)
-
Step 800
800 (this color)
#3143AF
oklch(43.8% 0.172 270.3)
-
Step 900
900
#283887
oklch(37.7% 0.133 270.1)
-
Step 950
950
#17214F
oklch(26.9% 0.085 270.4)
#3143AF 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) | #0055B3 | 0.048 |
| Deuteranopia (no green cones) | #0049AD | 0.033 |
| Tritanopia (no blue cones) | #005E72 | 0.137 |
| Achromatopsia (no color) | #4F4F4F | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3143AF
#3143AF
oklch(43.8% 0.172 270.3)
- #654F00
#654F00
oklch(43.8% 0.09 90.2)
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 #3143AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.035
- Blue Blue #2242C7 ΔE 0.041
- Majorelle Blue #3F37C9 ΔE 0.049
- Blueberry #464196 ΔE 0.049
- Cobalt #1E488F ΔE 0.058
- Blue With A Hint Of Purple #533CC6 ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.067
- Blurple #5539CC ΔE 0.069
Use #3143AF 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.