#151A52
Closest named color: Dark Indigo (#1F0954). oklch(25.5% 0.101 273), rgb(21, 26, 82).
Aa
White text reads best on this color (16.13:1).
About this color
#151A52 is a dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.101 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.036 away. White text reads best on it, at 16.13:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.30:1 |
| White text | 16.13:1 |
Values
| HEX | #151A52 |
| RGB | rgb(21, 26, 82) |
| HSL | hsl(235, 59%, 20%) |
| OKLCH | oklch(25.5% 0.101 273) |
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 #151A52 | 16.13:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #151A52 | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #151A52 text on white | 16.13:1 | AAA | Lc 102.8 | Preferred for body text |
| #151A52 text on black | 1.30:1 | 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
#CCD7FF
oklch(88.4% 0.057 273.1)
-
Step 300
300
#ACBDFF
oklch(80.9% 0.095 273)
-
Step 400
400
#8298FF
oklch(70.8% 0.152 272.8)
-
Step 500
500
#6579FF
oklch(63.1% 0.198 273)
-
Step 600
600
#4D55FF
oklch(55.5% 0.246 273)
-
Step 700
700
#3F3DE8
oklch(49.1% 0.246 273.1)
-
Step 800
800
#3335BC
oklch(42.8% 0.204 273)
-
Step 900
900
#2A3194
oklch(37.7% 0.16 272.8)
-
Step 950
950 (this color)
#151A52
oklch(25.5% 0.101 273)
#151A52 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) | #002454 | 0.031 |
| Deuteranopia (no green cones) | #001E51 | 0.024 |
| Tritanopia (no blue cones) | #002833 | 0.081 |
| Achromatopsia (no color) | #212121 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151A52
#151A52
oklch(25.5% 0.101 273)
- #2B2200
#2B2200
oklch(25.5% 0.052 94.3)
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 #151A52, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.036
- Navy Blue #001146 ΔE 0.048
- Midnight Blue #191970 ΔE 0.054
- Darkblue #030764 ΔE 0.055
- Marine #042E60 ΔE 0.060
- Oxford Blue #1B263B ΔE 0.061
- Dark Royal Blue #02066F ΔE 0.066
- Night Blue #040348 ΔE 0.068
Use #151A52 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.