#3129CB
Closest named color: Majorelle Blue (#3F37C9). oklch(42.7% 0.234 272.6), rgb(49, 41, 203).
Aa
White text reads best on this color (9.09:1).
About this color
#3129CB is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.234 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Majorelle Blue (#3F37C9), ΔE 0.033 away. White text reads best on it, at 9.09:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.234) |
| Temperature | cool |
| Nearest name | Majorelle Blue (#3F37C9) |
| Black text | 2.31:1 |
| White text | 9.09:1 |
Values
| HEX | #3129CB |
| RGB | rgb(49, 41, 203) |
| HSL | hsl(243, 66%, 48%) |
| OKLCH | oklch(42.7% 0.234 272.6) |
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 #3129CB | 9.09:1 | AAA | Lc -94.1 | Preferred for body text |
| Black text on #3129CB | 2.31:1 | Fails | Lc 14.4 | Not readable |
| #3129CB text on white | 9.09:1 | AAA | Lc 89.5 | Fine for body text |
| #3129CB text on black | 2.31:1 | 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
#E3E9FF
oklch(93.6% 0.03 273.6)
-
Step 200
200
#CCD8FF
oklch(88.6% 0.055 271.8)
-
Step 300
300
#ABBDFF
oklch(80.9% 0.096 272.3)
-
Step 400
400
#8198FF
oklch(70.7% 0.153 272.5)
-
Step 500
500
#6479FF
oklch(63% 0.199 272.7)
-
Step 600
600
#4C56FF
oklch(55.6% 0.245 272.6)
-
Step 700
700
#3D2BFC
oklch(49.1% 0.283 272.5)
-
Step 800
800 (this color)
#3129CB
oklch(42.7% 0.234 272.6)
-
Step 900
900
#282B9F
oklch(37.7% 0.181 272.4)
-
Step 950
950
#171B5D
oklch(26.9% 0.115 273)
#3129CB 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) | #0050CF | 0.073 |
| Deuteranopia (no green cones) | #0040C8 | 0.045 |
| Tritanopia (no blue cones) | #005C7B | 0.180 |
| Achromatopsia (no color) | #484848 | 0.235 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3129CB
#3129CB
oklch(42.7% 0.234 272.6)
- #604D00
#604D00
oklch(42.7% 0.087 92.5)
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 #3129CB, closest first.
No curated palette has a color within ΔE 0.04 of #3129CB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Majorelle Blue #3F37C9 ΔE 0.033
- Blue Blue #2242C7 ΔE 0.042
- Ultramarine Blue #1805DB ΔE 0.051
- Indigo Blue #3A18B1 ΔE 0.052
- Sapphire #2138AB ΔE 0.056
- Violet Blue #510AC9 ΔE 0.056
- True Blue #010FCC ΔE 0.058
- Pure Blue #0203E2 ΔE 0.065
Use #3129CB 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.