#191E55
Closest named color: Dark Indigo (#1F0954). oklch(26.9% 0.099 273.8), rgb(25, 30, 85).
Aa
White text reads best on this color (15.46:1).
About this color
#191E55 is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.099 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.045 away. White text reads best on it, at 15.46:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.35:1 |
| White text | 15.46:1 |
Values
| HEX | #191E55 |
| RGB | rgb(25, 30, 85) |
| HSL | hsl(235, 55%, 22%) |
| OKLCH | oklch(26.9% 0.099 273.8) |
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 #191E55 | 15.46:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #191E55 | 1.35:1 | Fails | Lc 0.0 | Not readable |
| #191E55 text on white | 15.46:1 | AAA | Lc 102.1 | Preferred for body text |
| #191E55 text on black | 1.35:1 | 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
#CDD7FF
oklch(88.4% 0.056 274.2)
-
Step 300
300
#ADBDFF
oklch(81% 0.095 273.6)
-
Step 400
400
#8397FF
oklch(70.7% 0.153 273.6)
-
Step 500
500
#6778FF
oklch(63% 0.199 273.8)
-
Step 600
600
#5054FF
oklch(55.6% 0.246 273.9)
-
Step 700
700
#413EE5
oklch(49% 0.241 273.7)
-
Step 800
800
#3535B9
oklch(42.6% 0.2 273.9)
-
Step 900
900
#2C3192
oklch(37.6% 0.156 273.8)
-
Step 950
950 (this color)
#191E55
oklch(26.9% 0.099 273.8)
#191E55 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) | #002757 | 0.032 |
| Deuteranopia (no green cones) | #002254 | 0.027 |
| Tritanopia (no blue cones) | #002C36 | 0.082 |
| Achromatopsia (no color) | #242424 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #191E55
#191E55
oklch(26.9% 0.099 273.8)
- #2F2500
#2F2500
oklch(26.8% 0.055 93.5)
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 #191E55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.045
- Marine #042E60 ΔE 0.049
- Midnight Blue #191970 ΔE 0.049
- Oxford Blue #1B263B ΔE 0.058
- Navy Blue #001146 ΔE 0.062
- Darkblue #030764 ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.070
- Dark Royal Blue #02066F ΔE 0.071
Use #191E55 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.