#19338B
Closest named color: Twilight Blue (#0A437A). oklch(36.3% 0.15 266.1), rgb(25, 51, 139).
Aa
White text reads best on this color (11.12:1).
About this color
#19338B is a dark, vivid blue. In OKLCH its lightness is 36%, its chroma 0.150 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.054 away. White text reads best on it, at 11.12:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.88:1 |
| White text | 11.12:1 |
Values
| HEX | #19338B |
| RGB | rgb(25, 51, 139) |
| HSL | hsl(226, 70%, 32%) |
| OKLCH | oklch(36.3% 0.15 266.1) |
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 #19338B | 11.12:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #19338B | 1.88:1 | Fails | Lc 8.8 | Not readable |
| #19338B text on white | 11.12:1 | AAA | Lc 95.1 | Preferred for body text |
| #19338B text on black | 1.88:1 | Fails | Lc -7.5 | 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
#A4C0FF
oklch(81% 0.095 265.8)
-
Step 400
400
#749CFF
oklch(70.8% 0.152 266)
-
Step 500
500
#517FFF
oklch(63.2% 0.197 266)
-
Step 600
600
#315DFF
oklch(55.6% 0.244 266.2)
-
Step 700
700
#244AE1
oklch(49.2% 0.231 266.1)
-
Step 800
800
#1E3EB6
oklch(42.7% 0.192 266.1)
-
Step 900
900 (this color)
#19338B
oklch(36.3% 0.15 266.1)
-
Step 950
950
#112154
oklch(27% 0.095 266.7)
#19338B 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) | #00418E | 0.036 |
| Deuteranopia (no green cones) | #003689 | 0.016 |
| Tritanopia (no blue cones) | #004A5A | 0.116 |
| Achromatopsia (no color) | #3B3B3B | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #19338B
#19338B
oklch(36.3% 0.15 266.1)
- #4F3A00
#4F3A00
oklch(36.2% 0.074 85.7)
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 #19338B, closest first.
No curated palette has a color within ΔE 0.04 of #19338B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.054
- Sapphire #2138AB ΔE 0.056
- Cobalt #1E488F ΔE 0.057
- Royal #0C1793 ΔE 0.059
- Marine Blue #01386A ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.074
- Blueberry #464196 ΔE 0.077
- Midnight Blue #191970 ΔE 0.077
Use #19338B 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.