#243593
Closest named color: Sapphire (#2138AB). oklch(38% 0.155 269.5), rgb(36, 53, 147).
Aa
White text reads best on this color (10.47:1).
About this color
#243593 is a dark, vivid blue. In OKLCH its lightness is 38%, its chroma 0.155 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.040 away. White text reads best on it, at 10.47:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.00:1 |
| White text | 10.47:1 |
Values
| HEX | #243593 |
| RGB | rgb(36, 53, 147) |
| HSL | hsl(231, 61%, 36%) |
| OKLCH | oklch(38% 0.155 269.5) |
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 #243593 | 10.47:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #243593 | 2.00:1 | Fails | Lc 10.2 | Not readable |
| #243593 text on white | 10.47:1 | AAA | Lc 93.7 | Preferred for body text |
| #243593 text on black | 2.00:1 | Fails | Lc -8.8 | 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 900.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2EAFF
oklch(93.7% 0.03 269.1)
-
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
#4059FF
oklch(55.5% 0.245 269.5)
-
Step 700
700
#3243E6
oklch(49.1% 0.241 269.5)
-
Step 800
800
#2939B9
oklch(42.6% 0.199 269.6)
-
Step 900
900 (this color)
#243593
oklch(38% 0.155 269.5)
-
Step 950
950
#142055
oklch(27% 0.097 269.2)
#243593 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) | #004596 | 0.042 |
| Deuteranopia (no green cones) | #003A91 | 0.026 |
| Tritanopia (no blue cones) | #004D5F | 0.121 |
| Achromatopsia (no color) | #3F3F3F | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243593
#243593
oklch(38% 0.155 269.5)
- #534000
#534000
oklch(38.1% 0.078 89.6)
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 #243593, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.040
- Cobalt #1E488F ΔE 0.050
- Twilight Blue #0A437A ΔE 0.060
- Blueberry #464196 ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.061
- Indigo Blue #3A18B1 ΔE 0.068
- Royal #0C1793 ΔE 0.069
- Marine Blue #01386A ΔE 0.077
Use #243593 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.