#2D1CD8
Closest named color: Ultramarine Blue (#1805DB). oklch(42.8% 0.257 271.2), rgb(45, 28, 216).
Aa
White text reads best on this color (9.25:1).
About this color
#2D1CD8 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.257 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Ultramarine Blue (#1805DB), ΔE 0.032 away. White text reads best on it, at 9.25:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.257) |
| Temperature | cool |
| Nearest name | Ultramarine Blue (#1805DB) |
| Black text | 2.26:1 |
| White text | 9.25:1 |
Values
| HEX | #2D1CD8 |
| RGB | rgb(45, 28, 216) |
| HSL | hsl(245, 77%, 48%) |
| OKLCH | oklch(42.8% 0.257 271.2) |
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 #2D1CD8 | 9.25:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #2D1CD8 | 2.26:1 | Fails | Lc 14.6 | Not readable |
| #2D1CD8 text on white | 9.25:1 | AAA | Lc 89.4 | Fine for body text |
| #2D1CD8 text on black | 2.26:1 | Fails | Lc -12.8 | 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
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#AABEFF
oklch(81% 0.095 271)
-
Step 400
400
#7E99FF
oklch(70.7% 0.152 270.9)
-
Step 500
500
#607BFF
oklch(63.2% 0.197 271)
-
Step 600
600
#4758FF
oklch(55.7% 0.244 271.2)
-
Step 700
700
#382AFF
oklch(49.1% 0.288 271.2)
-
Step 800
800 (this color)
#2D1CD8
oklch(42.8% 0.257 271.2)
-
Step 900
900
#2425A9
oklch(37.7% 0.201 271.1)
-
Step 950
950
#141963
oklch(27% 0.127 271.3)
#2D1CD8 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) | #0050DD | 0.082 |
| Deuteranopia (no green cones) | #003ED5 | 0.048 |
| Tritanopia (no blue cones) | #005D80 | 0.195 |
| Achromatopsia (no color) | #474747 | 0.259 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D1CD8
#2D1CD8
oklch(42.8% 0.257 271.2)
- #614D00
#614D00
oklch(42.9% 0.088 91.6)
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 #2D1CD8, closest first.
No curated palette has a color within ΔE 0.04 of #2D1CD8.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ultramarine Blue #1805DB ΔE 0.032
- Pure Blue #0203E2 ΔE 0.045
- True Blue #010FCC ΔE 0.049
- Majorelle Blue #3F37C9 ΔE 0.052
- Medium Blue #0000CD ΔE 0.055
- Strong Blue #0C06F7 ΔE 0.057
- Blue Blue #2242C7 ΔE 0.058
- Rich Blue #021BF9 ΔE 0.061
Use #2D1CD8 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.