#2618DD
Closest named color: Ultramarine Blue (#1805DB). oklch(42.7% 0.266 269.3), rgb(38, 24, 221).
Aa
White text reads best on this color (9.30:1).
About this color
#2618DD is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.266 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Ultramarine Blue (#1805DB), ΔE 0.022 away. White text reads best on it, at 9.30:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.266) |
| Temperature | cool |
| Nearest name | Ultramarine Blue (#1805DB) |
| Black text | 2.25:1 |
| White text | 9.30:1 |
Values
| HEX | #2618DD |
| RGB | rgb(38, 24, 221) |
| HSL | hsl(244, 80%, 48%) |
| OKLCH | oklch(42.7% 0.266 269.3) |
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 #2618DD | 9.30:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #2618DD | 2.25:1 | Fails | Lc 14.7 | Not readable |
| #2618DD text on white | 9.30:1 | AAA | Lc 89.3 | Fine for body text |
| #2618DD text on black | 2.25:1 | Fails | Lc -12.9 | 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
#E1EAFF
oklch(93.7% 0.03 267.2)
-
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
#7B9AFF
oklch(70.8% 0.152 269.4)
-
Step 500
500
#5B7CFF
oklch(63.1% 0.198 269.4)
-
Step 600
600
#3F5AFF
oklch(55.6% 0.244 269.2)
-
Step 700
700
#2F2EFF
oklch(49% 0.287 269.2)
-
Step 800
800 (this color)
#2618DD
oklch(42.7% 0.266 269.3)
-
Step 900
900
#1E24AD
oklch(37.7% 0.208 269.2)
-
Step 950
950
#101965
oklch(27% 0.131 269.2)
#2618DD 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) | #0050E2 | 0.084 |
| Deuteranopia (no green cones) | #003CDA | 0.045 |
| Tritanopia (no blue cones) | #005F83 | 0.200 |
| Achromatopsia (no color) | #474747 | 0.268 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2618DD
#2618DD
oklch(42.7% 0.266 269.3)
- #624C00
#624C00
oklch(42.8% 0.087 89.5)
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 #2618DD, closest first.
No curated palette has a color within ΔE 0.04 of #2618DD.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ultramarine Blue #1805DB ΔE 0.022
- Pure Blue #0203E2 ΔE 0.033
- True Blue #010FCC ΔE 0.045
- Strong Blue #0C06F7 ΔE 0.046
- Primary Blue #0804F9 ΔE 0.050
- Rich Blue #021BF9 ΔE 0.050
- Medium Blue #0000CD ΔE 0.050
- Blue #0000FF ΔE 0.059
Use #2618DD 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.