#191D4E
Closest named color: Dark Indigo (#1F0954). oklch(26% 0.089 274.8), rgb(25, 29, 78).
Aa
White text reads best on this color (15.82:1).
About this color
#191D4E is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.089 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.044 away. White text reads best on it, at 15.82:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.32:1 |
| White text | 15.82:1 |
Values
| HEX | #191D4E |
| RGB | rgb(25, 29, 78) |
| HSL | hsl(235, 51%, 20%) |
| OKLCH | oklch(26% 0.089 274.8) |
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 #191D4E | 15.82:1 | AAA | Lc -105.2 | Preferred for body text |
| Black text on #191D4E | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #191D4E text on white | 15.82:1 | AAA | Lc 102.5 | Preferred for body text |
| #191D4E text on black | 1.32:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FF
oklch(93.6% 0.03 273.6)
-
Step 200
200
#CED7FF
oklch(88.5% 0.056 275.2)
-
Step 300
300
#AEBCFF
oklch(80.9% 0.096 274.9)
-
Step 400
400
#8596FF
oklch(70.6% 0.154 274.8)
-
Step 500
500
#6A77FF
oklch(63% 0.2 275)
-
Step 600
600
#5457F8
oklch(55.7% 0.234 274.9)
-
Step 700
700
#4545D8
oklch(49.1% 0.218 274.8)
-
Step 800
800
#383AAF
oklch(42.7% 0.181 274.8)
-
Step 900
900
#2F348A
oklch(37.6% 0.141 274.8)
-
Step 950
950 (this color)
#191D4E
oklch(26% 0.089 274.8)
#191D4E 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) | #002550 | 0.032 |
| Deuteranopia (no green cones) | #00204D | 0.028 |
| Tritanopia (no blue cones) | #002932 | 0.076 |
| Achromatopsia (no color) | #222222 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #191D4E
#191D4E
oklch(26% 0.089 274.8)
- #2C2300
#2C2300
oklch(25.9% 0.053 94.6)
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 #191D4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.044
- Oxford Blue #1B263B ΔE 0.049
- Navy Blue #001146 ΔE 0.055
- Marine #042E60 ΔE 0.057
- Midnight Blue #191970 ΔE 0.062
- Dark #1B2431 ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.068
- Darkblue #030764 ΔE 0.068
Use #191D4E 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.