#3143AD
Closest named color: Sapphire (#2138AB). oklch(43.7% 0.17 270.3), rgb(49, 67, 173).
Aa
White text reads best on this color (8.27:1).
About this color
#3143AD is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.170 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.034 away. White text reads best on it, at 8.27:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.53:1 |
| White text | 8.27:1 |
Values
| HEX | #3143AD |
| RGB | rgb(49, 67, 173) |
| HSL | hsl(231, 56%, 44%) |
| OKLCH | oklch(43.7% 0.17 270.3) |
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 #3143AD | 8.27:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #3143AD | 2.53:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #3143AD text on white | 8.27:1 | AAA | Lc 88.1 | Fine for body text |
| #3143AD text on black | 2.53:1 | Fails | Lc -14.1 | 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
#475FF1
oklch(55.7% 0.219 270.4)
-
Step 700
700
#394DD2
oklch(49.2% 0.204 270.2)
-
Step 800
800 (this color)
#3143AD
oklch(43.7% 0.17 270.3)
-
Step 900
900
#283886
oklch(37.7% 0.132 270.1)
-
Step 950
950
#17224F
oklch(27.1% 0.084 269.7)
#3143AD 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) | #0054B0 | 0.046 |
| Deuteranopia (no green cones) | #0049AB | 0.033 |
| Tritanopia (no blue cones) | #005E71 | 0.137 |
| Achromatopsia (no color) | #4E4E4E | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3143AD
#3143AD
oklch(43.7% 0.17 270.3)
- #644F00
#644F00
oklch(43.7% 0.089 91.1)
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 #3143AD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.034
- Blue Blue #2242C7 ΔE 0.044
- Blueberry #464196 ΔE 0.046
- Majorelle Blue #3F37C9 ΔE 0.052
- Cobalt #1E488F ΔE 0.055
- Blue With A Hint Of Purple #533CC6 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.064
- Dusk Blue #26538D ΔE 0.071
Use #3143AD 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.