#101B48
Closest named color: Navy Blue (#001146). oklch(24.4% 0.085 268.8), rgb(16, 27, 72).
Aa
White text reads best on this color (16.50:1).
About this color
#101B48 is a very dark, moderately saturated blue. In OKLCH its lightness is 24%, its chroma 0.085 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.039 away. White text reads best on it, at 16.50:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.27:1 |
| White text | 16.50:1 |
Values
| HEX | #101B48 |
| RGB | rgb(16, 27, 72) |
| HSL | hsl(228, 64%, 17%) |
| OKLCH | oklch(24.4% 0.085 268.8) |
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 #101B48 | 16.50:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #101B48 | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #101B48 text on white | 16.50:1 | AAA | Lc 103.2 | Preferred for body text |
| #101B48 text on black | 1.27:1 | 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
#E2EAFE
oklch(93.7% 0.028 268.4)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A7BEFF
oklch(80.8% 0.096 269.2)
-
Step 400
400
#7A9AFF
oklch(70.7% 0.152 269)
-
Step 500
500
#597CFF
oklch(63% 0.198 268.8)
-
Step 600
600
#415FF4
oklch(55.6% 0.225 268.9)
-
Step 700
700
#344DD4
oklch(49.1% 0.208 268.9)
-
Step 800
800
#2A40AC
oklch(42.7% 0.174 268.8)
-
Step 900
900
#253888
oklch(37.7% 0.135 268.8)
-
Step 950
950 (this color)
#101B48
oklch(24.4% 0.085 268.8)
#101B48 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) | #00224A | 0.024 |
| Deuteranopia (no green cones) | #001C47 | 0.018 |
| Tritanopia (no blue cones) | #00262E | 0.069 |
| Achromatopsia (no color) | #1F1F1F | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101B48
#101B48
oklch(24.4% 0.085 268.8)
- #2A1E00
#2A1E00
oklch(24.3% 0.05 87.2)
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 #101B48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.039
- Dark Indigo #1F0954 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.050
- Rich Black #0D1B2A ΔE 0.059
- Dark #1B2431 ΔE 0.060
- Night Blue #040348 ΔE 0.063
- Darkblue #030764 ΔE 0.066
- Marine #042E60 ΔE 0.068
Use #101B48 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.