#191E37
Closest named color: Dark (#1B2431). oklch(24.4% 0.048 273.7), rgb(25, 30, 55).
Aa
White text reads best on this color (16.37:1).
About this color
#191E37 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.048 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.027 away. White text reads best on it, at 16.37:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.28:1 |
| White text | 16.37:1 |
Values
| HEX | #191E37 |
| RGB | rgb(25, 30, 55) |
| HSL | hsl(230, 38%, 16%) |
| OKLCH | oklch(24.4% 0.048 273.7) |
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 #191E37 | 16.37:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #191E37 | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #191E37 text on white | 16.37:1 | AAA | Lc 103.3 | Preferred for body text |
| #191E37 text on black | 1.28:1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EF
oklch(88.5% 0.032 274.1)
-
Step 300
300
#B4BFE6
oklch(80.9% 0.056 272.7)
-
Step 400
400
#8E9DDA
oklch(70.8% 0.091 273.2)
-
Step 500
500
#7383D0
oklch(63% 0.117 273.7)
-
Step 600
600
#5D6CBD
oklch(55.7% 0.126 273.7)
-
Step 700
700
#4C59A3
oklch(49% 0.119 273.7)
-
Step 800
800
#3F4984
oklch(42.7% 0.098 274.2)
-
Step 900
900
#353E6A
oklch(37.8% 0.076 273.5)
-
Step 950
950 (this color)
#191E37
oklch(24.4% 0.048 273.7)
#191E37 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) | #152138 | 0.011 |
| Deuteranopia (no green cones) | #121E36 | 0.011 |
| Tritanopia (no blue cones) | #0E2327 | 0.043 |
| Achromatopsia (no color) | #202020 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #191E37
#191E37
oklch(24.4% 0.048 273.7)
- #281F01
#281F01
oklch(24.3% 0.048 92.6)
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 #191E37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.027
- Oxford Blue #1B263B ΔE 0.027
- Rich Black #0D1B2A ΔE 0.033
- Jet #212529 ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.062
- Navy Blue #001146 ΔE 0.065
- Gunmetal #293241 ΔE 0.074
- Dark Indigo #1F0954 ΔE 0.075
Use #191E37 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.