#1B1A49
Closest named color: Dark Indigo (#1F0954). oklch(25.1% 0.085 279.3), rgb(27, 26, 73).
Aa
White text reads best on this color (16.27:1).
About this color
#1B1A49 is a dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.085 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.040 away. White text reads best on it, at 16.27:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.29:1 |
| White text | 16.27:1 |
Values
| HEX | #1B1A49 |
| RGB | rgb(27, 26, 73) |
| HSL | hsl(241, 47%, 19%) |
| OKLCH | oklch(25.1% 0.085 279.3) |
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 #1B1A49 | 16.27:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #1B1A49 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #1B1A49 text on white | 16.27:1 | AAA | Lc 103.0 | Preferred for body text |
| #1B1A49 text on black | 1.29:1 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E5E8FE
oklch(93.5% 0.03 279.6)
-
Step 200
200
#D1D6FE
oklch(88.5% 0.055 279.6)
-
Step 300
300
#B3BAFF
oklch(80.8% 0.098 279.5)
-
Step 400
400
#8E93FF
oklch(70.6% 0.156 279.6)
-
Step 500
500
#7573FF
oklch(63% 0.202 279.5)
-
Step 600
600
#6056F1
oklch(55.7% 0.224 279.1)
-
Step 700
700
#5044D2
oklch(49.1% 0.209 279.2)
-
Step 800
800
#4139A9
oklch(42.6% 0.172 279.3)
-
Step 900
900
#363386
oklch(37.6% 0.135 279.3)
-
Step 950
950 (this color)
#1B1A49
oklch(25.1% 0.085 279.3)
#1B1A49 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) | #00224B | 0.036 |
| Deuteranopia (no green cones) | #001E48 | 0.034 |
| Tritanopia (no blue cones) | #03252E | 0.074 |
| Achromatopsia (no color) | #202020 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B1A49
#1B1A49
oklch(25.1% 0.085 279.3)
- #282200
#282200
oklch(25.1% 0.052 99.5)
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 #1B1A49, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.040
- Oxford Blue #1B263B ΔE 0.050
- Navy Blue #001146 ΔE 0.051
- Dark #1B2431 ΔE 0.061
- Rich Black #0D1B2A ΔE 0.065
- Marine #042E60 ΔE 0.069
- Dark Purple #35063E ΔE 0.070
- Midnight Blue #191970 ΔE 0.071
Use #1B1A49 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.