#151748
Closest named color: Dark Indigo (#1F0954). oklch(23.8% 0.09 275.5), rgb(21, 23, 72).
Aa
White text reads best on this color (16.82:1).
About this color
#151748 is a very dark, moderately saturated blue. In OKLCH its lightness is 24%, its chroma 0.090 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.037 away. White text reads best on it, at 16.82:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.24:1 |
| White text | 16.82:1 |
Values
| HEX | #151748 |
| RGB | rgb(21, 23, 72) |
| HSL | hsl(238, 55%, 18%) |
| OKLCH | oklch(23.8% 0.09 275.5) |
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 #151748 | 16.82:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #151748 | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #151748 text on white | 16.82:1 | AAA | Lc 103.5 | Preferred for body text |
| #151748 text on black | 1.24:1 | 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
#6B77FF
oklch(63.1% 0.199 275.3)
-
Step 600
600
#5556F9
oklch(55.6% 0.236 275.3)
-
Step 700
700
#4744D9
oklch(49.1% 0.219 275.6)
-
Step 800
800
#393AAF
oklch(42.7% 0.181 275.2)
-
Step 900
900
#30348A
oklch(37.7% 0.14 275.3)
-
Step 950
950 (this color)
#151748
oklch(23.8% 0.09 275.5)
#151748 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) | #001F4A | 0.030 |
| Deuteranopia (no green cones) | #001B47 | 0.026 |
| Tritanopia (no blue cones) | #00232C | 0.075 |
| Achromatopsia (no color) | #1D1D1D | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151748
#151748
oklch(23.8% 0.09 275.5)
- #261E00
#261E00
oklch(23.7% 0.049 94.7)
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 #151748, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.037
- Navy Blue #001146 ΔE 0.037
- Oxford Blue #1B263B ΔE 0.058
- Night Blue #040348 ΔE 0.058
- Rich Black #0D1B2A ΔE 0.062
- Darkblue #030764 ΔE 0.064
- Dark #1B2431 ΔE 0.067
- Midnight Purple #280137 ΔE 0.070
Use #151748 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.