#2831C4
Closest named color: Blue Blue (#2242C7). oklch(42.5% 0.221 269.8), rgb(40, 49, 196).
Aa
White text reads best on this color (9.02:1).
About this color
#2831C4 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.221 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.032 away. White text reads best on it, at 9.02:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.221) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.32:1 |
| White text | 9.02:1 |
Values
| HEX | #2831C4 |
| RGB | rgb(40, 49, 196) |
| HSL | hsl(237, 66%, 46%) |
| OKLCH | oklch(42.5% 0.221 269.8) |
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 #2831C4 | 9.02:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #2831C4 | 2.32:1 | Fails | Lc 14.4 | Not readable |
| #2831C4 text on white | 9.02:1 | AAA | Lc 89.6 | Fine for body text |
| #2831C4 text on black | 2.32:1 | Fails | Lc -12.7 | 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
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5C7CFF
oklch(63.1% 0.197 269.6)
-
Step 600
600
#4259FF
oklch(55.6% 0.245 269.9)
-
Step 700
700
#3238F4
oklch(49.1% 0.267 269.8)
-
Step 800
800 (this color)
#2831C4
oklch(42.5% 0.221 269.8)
-
Step 900
900
#22309B
oklch(37.8% 0.172 269.7)
-
Step 950
950
#131E5A
oklch(27% 0.108 269.6)
#2831C4 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) | #0051C8 | 0.065 |
| Deuteranopia (no green cones) | #0041C1 | 0.034 |
| Tritanopia (no blue cones) | #005D78 | 0.171 |
| Achromatopsia (no color) | #494949 | 0.222 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2831C4
#2831C4
oklch(42.5% 0.221 269.8)
- #614B00
#614B00
oklch(42.4% 0.087 89.3)
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 #2831C4, closest first.
No curated palette has a color within ΔE 0.04 of #2831C4.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.032
- Majorelle Blue #3F37C9 ΔE 0.036
- Sapphire #2138AB ΔE 0.041
- Indigo Blue #3A18B1 ΔE 0.054
- Ultramarine Blue #1805DB ΔE 0.057
- True Blue #010FCC ΔE 0.058
- Medium Blue #0000CD ΔE 0.066
- Violet Blue #510AC9 ΔE 0.069
Use #2831C4 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.