#1B1E50
Closest named color: Dark Indigo (#1F0954). oklch(26.6% 0.09 275.8), rgb(27, 30, 80).
Aa
White text reads best on this color (15.57:1).
About this color
#1B1E50 is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.090 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.046 away. White text reads best on it, at 15.57:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.34:1 |
| White text | 15.57:1 |
Values
| HEX | #1B1E50 |
| RGB | rgb(27, 30, 80) |
| HSL | hsl(237, 50%, 21%) |
| OKLCH | oklch(26.6% 0.09 275.8) |
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 #1B1E50 | 15.57:1 | AAA | Lc -105.0 | Preferred for body text |
| Black text on #1B1E50 | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #1B1E50 text on white | 15.57:1 | AAA | Lc 102.3 | Preferred for body text |
| #1B1E50 text on black | 1.34:1 | 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
#E4E9FF
oklch(93.7% 0.03 275.6)
-
Step 200
200
#CED7FF
oklch(88.5% 0.056 275.2)
-
Step 300
300
#AFBCFF
oklch(80.9% 0.096 275.6)
-
Step 400
400
#8796FF
oklch(70.7% 0.154 275.6)
-
Step 500
500
#6C77FF
oklch(63.2% 0.199 275.6)
-
Step 600
600
#5655F9
oklch(55.5% 0.237 275.7)
-
Step 700
700
#4843D9
oklch(49% 0.22 276)
-
Step 800
800
#3A39B0
oklch(42.7% 0.183 275.7)
-
Step 900
900
#31338B
oklch(37.7% 0.143 276.1)
-
Step 950
950 (this color)
#1B1E50
oklch(26.6% 0.09 275.8)
#1B1E50 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) | #002652 | 0.033 |
| Deuteranopia (no green cones) | #00224F | 0.031 |
| Tritanopia (no blue cones) | #002A33 | 0.078 |
| Achromatopsia (no color) | #242424 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1B1E50
#1B1E50
oklch(26.6% 0.09 275.8)
- #2D2500
#2D2500
oklch(26.6% 0.055 96.8)
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 #1B1E50, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.050
- Marine #042E60 ΔE 0.053
- Midnight Blue #191970 ΔE 0.058
- Navy Blue #001146 ΔE 0.061
- Dark #1B2431 ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.065
- Darkblue #030764 ΔE 0.070
Use #1B1E50 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.