#351AD5
Closest named color: Ultramarine Blue (#1805DB). oklch(42.7% 0.253 273.7), rgb(53, 26, 213).
Aa
White text reads best on this color (9.29:1).
About this color
#351AD5 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.253 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Ultramarine Blue (#1805DB), ΔE 0.042 away. White text reads best on it, at 9.29:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.253) |
| Temperature | cool |
| Nearest name | Ultramarine Blue (#1805DB) |
| Black text | 2.25:1 |
| White text | 9.29:1 |
Values
| HEX | #351AD5 |
| RGB | rgb(53, 26, 213) |
| HSL | hsl(249, 78%, 47%) |
| OKLCH | oklch(42.7% 0.253 273.7) |
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 #351AD5 | 9.29:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #351AD5 | 2.25:1 | Fails | Lc 14.4 | Not readable |
| #351AD5 text on white | 9.29:1 | AAA | Lc 89.5 | Fine for body text |
| #351AD5 text on black | 2.25:1 | 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
#CDD7FF
oklch(88.4% 0.056 274.2)
-
Step 300
300
#ADBDFF
oklch(81% 0.095 273.6)
-
Step 400
400
#8397FF
oklch(70.7% 0.153 273.6)
-
Step 500
500
#6778FF
oklch(63% 0.199 273.8)
-
Step 600
600
#4F54FF
oklch(55.5% 0.247 273.7)
-
Step 700
700
#4224FF
oklch(49.1% 0.289 273.8)
-
Step 800
800 (this color)
#351AD5
oklch(42.7% 0.253 273.7)
-
Step 900
900
#2B24A7
oklch(37.7% 0.197 273.8)
-
Step 950
950
#181862
oklch(27% 0.126 274)
#351AD5 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) | #004FDA | 0.084 |
| Deuteranopia (no green cones) | #003ED2 | 0.054 |
| Tritanopia (no blue cones) | #005B7E | 0.193 |
| Achromatopsia (no color) | #474747 | 0.255 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #351AD5
#351AD5
oklch(42.7% 0.253 273.7)
- #5F4D00
#5F4D00
oklch(42.6% 0.087 93.4)
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 #351AD5, closest first.
No curated palette has a color within ΔE 0.04 of #351AD5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ultramarine Blue #1805DB ΔE 0.042
- Majorelle Blue #3F37C9 ΔE 0.046
- Violet Blue #510AC9 ΔE 0.054
- Pure Blue #0203E2 ΔE 0.056
- True Blue #010FCC ΔE 0.057
- Blue Blue #2242C7 ΔE 0.059
- Indigo Blue #3A18B1 ΔE 0.061
- Medium Blue #0000CD ΔE 0.063
Use #351AD5 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.