#131C4F
Closest named color: Dark Indigo (#1F0954). oklch(25.5% 0.094 270.6), rgb(19, 28, 79).
Aa
White text reads best on this color (16.07:1).
About this color
#131C4F is a dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.094 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 16.07:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.30:1 |
| White text | 16.07:1 |
Values
| HEX | #131C4F |
| RGB | rgb(19, 28, 79) |
| HSL | hsl(231, 61%, 19%) |
| OKLCH | oklch(25.5% 0.094 270.6) |
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 #131C4F | 16.07:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #131C4F | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #131C4F text on white | 16.07:1 | AAA | Lc 102.7 | Preferred for body text |
| #131C4F 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
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7D99FF
oklch(70.7% 0.152 270.5)
-
Step 500
500
#5F7BFF
oklch(63.1% 0.198 270.7)
-
Step 600
600
#4558FF
oklch(55.6% 0.245 270.7)
-
Step 700
700
#3745E0
oklch(49% 0.231 270.6)
-
Step 800
800
#2D3BB5
oklch(42.8% 0.191 270.5)
-
Step 900
900
#27358F
oklch(37.8% 0.149 270.7)
-
Step 950
950 (this color)
#131C4F
oklch(25.5% 0.094 270.6)
#131C4F 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) | #002451 | 0.027 |
| Deuteranopia (no green cones) | #001F4E | 0.020 |
| Tritanopia (no blue cones) | #002932 | 0.077 |
| Achromatopsia (no color) | #212121 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131C4F
#131C4F
oklch(25.5% 0.094 270.6)
- #2C2100
#2C2100
oklch(25.4% 0.052 90.4)
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 #131C4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.043
- Navy Blue #001146 ΔE 0.047
- Oxford Blue #1B263B ΔE 0.054
- Marine #042E60 ΔE 0.058
- Midnight Blue #191970 ΔE 0.060
- Darkblue #030764 ΔE 0.060
- Dark #1B2431 ΔE 0.067
- Night Blue #040348 ΔE 0.069
Use #131C4F 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.