#18419B
Closest named color: Cobalt (#1E488F). oklch(40.6% 0.154 262.9), rgb(24, 65, 155).
Aa
White text reads best on this color (9.25:1).
About this color
#18419B is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.154 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.029 away. White text reads best on it, at 9.25:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.26:1 |
| White text | 9.25:1 |
Values
| HEX | #18419B |
| RGB | rgb(24, 65, 155) |
| HSL | hsl(221, 73%, 35%) |
| OKLCH | oklch(40.6% 0.154 262.9) |
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 #18419B | 9.25:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #18419B | 2.26:1 | Fails | Lc 13.2 | Not readable |
| #18419B text on white | 9.25:1 | AAA | Lc 90.8 | Preferred for body text |
| #18419B text on black | 2.26:1 | Fails | Lc -11.6 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFB
oklch(88.5% 0.05 262.6)
-
Step 300
300
#A2C1FC
oklch(80.9% 0.091 263)
-
Step 400
400
#709EFA
oklch(70.7% 0.144 263.1)
-
Step 500
500
#4B83F7
oklch(63.2% 0.184 262.9)
-
Step 600
600
#2F69E6
oklch(55.7% 0.2 262.9)
-
Step 700
700
#2256C8
oklch(49.1% 0.186 262.9)
-
Step 800
800 (this color)
#18419B
oklch(40.6% 0.154 262.9)
-
Step 900
900
#1D3D80
oklch(37.7% 0.12 262.8)
-
Step 950
950
#12244B
oklch(26.9% 0.076 263.5)
#18419B 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) | #004D9E | 0.031 |
| Deuteranopia (no green cones) | #004199 | 0.013 |
| Tritanopia (no blue cones) | #005867 | 0.120 |
| Achromatopsia (no color) | #474747 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18419B
#18419B
oklch(40.6% 0.154 262.9)
- #5F4400
#5F4400
oklch(40.6% 0.083 82.8)
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 #18419B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.029
- Sapphire #2138AB ΔE 0.033
- Blueberry #464196 ΔE 0.055
- Twilight Blue #0A437A ΔE 0.057
- Light Navy #155084 ΔE 0.060
- Dusk Blue #26538D ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.063
- Deep Sea Blue #015482 ΔE 0.072
Use #18419B 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.