#101D4E
Closest named color: Navy Blue (#001146). oklch(25.4% 0.092 267.9), rgb(16, 29, 78).
Aa
White text reads best on this color (16.05:1).
About this color
#101D4E is a dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.092 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.046 away. White text reads best on it, at 16.05:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.30:1 |
| White text | 16.05:1 |
Values
| HEX | #101D4E |
| RGB | rgb(16, 29, 78) |
| HSL | hsl(227, 66%, 18%) |
| OKLCH | oklch(25.4% 0.092 267.9) |
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 #101D4E | 16.05:1 | AAA | Lc -105.3 | Preferred for body text |
| Black text on #101D4E | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #101D4E text on white | 16.05:1 | AAA | Lc 102.7 | Preferred for body text |
| #101D4E 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A6BFFF
oklch(80.9% 0.095 267.8)
-
Step 400
400
#789BFF
oklch(70.8% 0.152 267.9)
-
Step 500
500
#577DFF
oklch(63.1% 0.197 268)
-
Step 600
600
#3A5CFE
oklch(55.7% 0.242 267.9)
-
Step 700
700
#2E4ADD
oklch(49.2% 0.224 268)
-
Step 800
800
#263EB3
oklch(42.8% 0.186 268)
-
Step 900
900
#21378D
oklch(37.7% 0.145 267.7)
-
Step 950
950 (this color)
#101D4E
oklch(25.4% 0.092 267.9)
#101D4E 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) | #002450 | 0.023 |
| Deuteranopia (no green cones) | #001E4D | 0.016 |
| Tritanopia (no blue cones) | #002932 | 0.073 |
| Achromatopsia (no color) | #212121 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #101D4E
#101D4E
oklch(25.4% 0.092 267.9)
- #2D2100
#2D2100
oklch(25.5% 0.052 88.6)
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 #101D4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.046
- Dark Indigo #1F0954 ΔE 0.047
- Oxford Blue #1B263B ΔE 0.052
- Marine #042E60 ΔE 0.057
- Darkblue #030764 ΔE 0.061
- Midnight Blue #191970 ΔE 0.063
- Dark #1B2431 ΔE 0.065
- Rich Black #0D1B2A ΔE 0.069
Use #101D4E 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.