#18348D
Closest named color: Sapphire (#2138AB). oklch(36.7% 0.151 265.7), rgb(24, 52, 141).
Aa
White text reads best on this color (10.96:1).
About this color
#18348D is a dark, vivid blue. In OKLCH its lightness is 37%, its chroma 0.151 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.052 away. White text reads best on it, at 10.96:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 1.91:1 |
| White text | 10.96:1 |
Values
| HEX | #18348D |
| RGB | rgb(24, 52, 141) |
| HSL | hsl(226, 71%, 32%) |
| OKLCH | oklch(36.7% 0.151 265.7) |
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 #18348D | 10.96:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #18348D | 1.91:1 | Fails | Lc 9.2 | Not readable |
| #18348D text on white | 10.96:1 | AAA | Lc 94.7 | Preferred for body text |
| #18348D text on black | 1.91:1 | Fails | Lc -7.9 | 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 900.
-
Step 50
50
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#739CFF
oklch(70.7% 0.152 265.7)
-
Step 500
500
#4F7FFF
oklch(63.1% 0.197 265.6)
-
Step 600
600
#2E5EFF
oklch(55.7% 0.244 265.6)
-
Step 700
700
#2149E2
oklch(49% 0.234 265.8)
-
Step 800
800
#1B3EB7
oklch(42.7% 0.194 265.6)
-
Step 900
900 (this color)
#18348D
oklch(36.7% 0.151 265.7)
-
Step 950
950
#102154
oklch(26.9% 0.096 266.1)
#18348D 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) | #004290 | 0.036 |
| Deuteranopia (no green cones) | #00378B | 0.015 |
| Tritanopia (no blue cones) | #004B5B | 0.117 |
| Achromatopsia (no color) | #3C3C3C | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18348D
#18348D
oklch(36.7% 0.151 265.7)
- #513B00
#513B00
oklch(36.7% 0.075 84.9)
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 #18348D, closest first.
No curated palette has a color within ΔE 0.04 of #18348D.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.052
- Twilight Blue #0A437A ΔE 0.053
- Cobalt #1E488F ΔE 0.055
- Royal #0C1793 ΔE 0.060
- Marine Blue #01386A ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.073
- Blueberry #464196 ΔE 0.075
- Cobalt Blue #030AA7 ΔE 0.079
Use #18348D 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.