#151D53
Closest named color: Dark Indigo (#1F0954). oklch(26.2% 0.098 271.4), rgb(21, 29, 83).
Aa
White text reads best on this color (15.75:1).
About this color
#151D53 is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.098 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.043 away. White text reads best on it, at 15.75:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.33:1 |
| White text | 15.75:1 |
Values
| HEX | #151D53 |
| RGB | rgb(21, 29, 83) |
| HSL | hsl(232, 60%, 20%) |
| OKLCH | oklch(26.2% 0.098 271.4) |
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 #151D53 | 15.75:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #151D53 | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #151D53 text on white | 15.75:1 | AAA | Lc 102.4 | Preferred for body text |
| #151D53 text on black | 1.33:1 | 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
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#AABDFF
oklch(80.8% 0.096 271.7)
-
Step 400
400
#7F99FF
oklch(70.8% 0.152 271.3)
-
Step 500
500
#617AFF
oklch(63% 0.198 271.6)
-
Step 600
600
#4857FF
oklch(55.6% 0.245 271.6)
-
Step 700
700
#3A41E5
oklch(49.1% 0.24 271.6)
-
Step 800
800
#2F38B9
oklch(42.8% 0.199 271.5)
-
Step 900
900
#283392
oklch(37.7% 0.155 271.5)
-
Step 950
950 (this color)
#151D53
oklch(26.2% 0.098 271.4)
#151D53 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) | #002655 | 0.029 |
| Deuteranopia (no green cones) | #002052 | 0.022 |
| Tritanopia (no blue cones) | #002A34 | 0.079 |
| Achromatopsia (no color) | #232323 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #151D53
#151D53
oklch(26.2% 0.098 271.4)
- #2E2300
#2E2300
oklch(26.2% 0.053 91.2)
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 #151D53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.043
- Marine #042E60 ΔE 0.052
- Midnight Blue #191970 ΔE 0.053
- Navy Blue #001146 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.057
- Darkblue #030764 ΔE 0.059
- Dark Royal Blue #02066F ΔE 0.069
- Dark #1B2431 ΔE 0.072
Use #151D53 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.