#2323AB
Closest named color: Ultramarine (#2000B1). oklch(37.6% 0.205 270.8), rgb(35, 35, 171).
Aa
White text reads best on this color (11.05:1).
About this color
#2323AB is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.205 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Ultramarine (#2000B1), ΔE 0.034 away. White text reads best on it, at 11.05:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.205) |
| Temperature | cool |
| Nearest name | Ultramarine (#2000B1) |
| Black text | 1.89:1 |
| White text | 11.05:1 |
Values
| HEX | #2323AB |
| RGB | rgb(35, 35, 171) |
| HSL | hsl(240, 66%, 40%) |
| OKLCH | oklch(37.6% 0.205 270.8) |
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 #2323AB | 11.05:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #2323AB | 1.89:1 | Fails | Lc 9.6 | Not readable |
| #2323AB text on white | 11.05:1 | AAA | Lc 94.3 | Preferred for body text |
| #2323AB text on black | 1.89:1 | Fails | Lc -8.3 | 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 900.
-
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
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7E99FF
oklch(70.7% 0.152 270.9)
-
Step 500
500
#5F7BFF
oklch(63.1% 0.198 270.7)
-
Step 600
600
#4558FF
oklch(55.6% 0.245 270.7)
-
Step 700
700
#362BFF
oklch(49.1% 0.288 270.7)
-
Step 800
800
#2C17DB
oklch(42.7% 0.263 270.9)
-
Step 900
900 (this color)
#2323AB
oklch(37.6% 0.205 270.8)
-
Step 950
950
#131864
oklch(26.9% 0.13 271)
#2323AB 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) | #0043AF | 0.063 |
| Deuteranopia (no green cones) | #0035A9 | 0.035 |
| Tritanopia (no blue cones) | #004D67 | 0.157 |
| Achromatopsia (no color) | #3C3C3C | 0.206 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2323AB
#2323AB
oklch(37.6% 0.205 270.8)
- #513F00
#513F00
oklch(37.6% 0.077 90.4)
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 #2323AB, closest first.
No curated palette has a color within ΔE 0.04 of #2323AB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ultramarine #2000B1 ΔE 0.034
- Indigo Blue #3A18B1 ΔE 0.035
- Sapphire #2138AB ΔE 0.039
- Cobalt Blue #030AA7 ΔE 0.050
- Royal #0C1793 ΔE 0.057
- True Blue #010FCC ΔE 0.062
- Imperial Purple #480CA8 ΔE 0.064
- Medium Blue #0000CD ΔE 0.067
Use #2323AB 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.