#2C43B1
Closest named color: Sapphire (#2138AB). oklch(43.8% 0.176 268.7), rgb(44, 67, 177).
Aa
White text reads best on this color (8.25:1).
About this color
#2C43B1 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.176 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.032 away. White text reads best on it, at 8.25:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.54:1 |
| White text | 8.25:1 |
Values
| HEX | #2C43B1 |
| RGB | rgb(44, 67, 177) |
| HSL | hsl(230, 60%, 43%) |
| OKLCH | oklch(43.8% 0.176 268.7) |
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 #2C43B1 | 8.25:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #2C43B1 | 2.54:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #2C43B1 text on white | 8.25:1 | AAA | Lc 87.9 | Fine for body text |
| #2C43B1 text on black | 2.54:1 | Fails | Lc -14.2 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A7BFFF
oklch(81% 0.095 268.4)
-
Step 400
400
#799AFF
oklch(70.6% 0.153 268.6)
-
Step 500
500
#597DFF
oklch(63.2% 0.197 268.6)
-
Step 600
600
#3F5EF6
oklch(55.5% 0.229 268.7)
-
Step 700
700
#334CD7
oklch(49.1% 0.213 268.8)
-
Step 800
800 (this color)
#2C43B1
oklch(43.8% 0.176 268.7)
-
Step 900
900
#253889
oklch(37.7% 0.137 268.9)
-
Step 950
950
#152250
oklch(27.1% 0.086 268.3)
#2C43B1 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) | #0055B5 | 0.046 |
| Deuteranopia (no green cones) | #0048AF | 0.027 |
| Tritanopia (no blue cones) | #005F73 | 0.139 |
| Achromatopsia (no color) | #4F4F4F | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C43B1
#2C43B1
oklch(43.8% 0.176 268.7)
- #664E00
#664E00
oklch(43.7% 0.089 88.2)
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 #2C43B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.032
- Blue Blue #2242C7 ΔE 0.036
- Majorelle Blue #3F37C9 ΔE 0.048
- Blueberry #464196 ΔE 0.055
- Cobalt #1E488F ΔE 0.059
- Blue With A Hint Of Purple #533CC6 ΔE 0.063
- Blurple #5539CC ΔE 0.071
- Dark Slate Blue #483D8B ΔE 0.072
Use #2C43B1 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.