#133773
Closest named color: Marine Blue (#01386A). oklch(34.9% 0.112 260.1), rgb(19, 55, 115).
Aa
White text reads best on this color (11.52:1).
About this color
#133773 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.112 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.020 away. White text reads best on it, at 11.52:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.82:1 |
| White text | 11.52:1 |
Values
| HEX | #133773 |
| RGB | rgb(19, 55, 115) |
| HSL | hsl(218, 72%, 26%) |
| OKLCH | oklch(34.9% 0.112 260.1) |
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 #133773 | 11.52:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #133773 | 1.82:1 | Fails | Lc 7.8 | Not readable |
| #133773 text on white | 11.52:1 | AAA | Lc 96.1 | Preferred for body text |
| #133773 text on black | 1.82:1 | 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 900.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFB
oklch(93.7% 0.024 259.8)
-
Step 200
200
#C8DAF9
oklch(88.5% 0.047 261.4)
-
Step 300
300
#A1C2F7
oklch(80.9% 0.084 259.8)
-
Step 400
400
#6EA0F3
oklch(70.6% 0.134 260.1)
-
Step 500
500
#4786EF
oklch(63.1% 0.171 260)
-
Step 600
600
#296DDE
oklch(55.7% 0.186 260.2)
-
Step 700
700
#1B5AC0
oklch(49.1% 0.172 260)
-
Step 800
800
#194A9C
oklch(42.7% 0.144 260.3)
-
Step 900
900 (this color)
#133773
oklch(34.9% 0.112 260.1)
-
Step 950
950
#102548
oklch(26.9% 0.071 260)
#133773 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) | #123E75 | 0.020 |
| Deuteranopia (no green cones) | #003572 | 0.014 |
| Tritanopia (no blue cones) | #00454F | 0.085 |
| Achromatopsia (no color) | #393939 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133773
#133773
oklch(34.9% 0.112 260.1)
- #4E3500
#4E3500
oklch(34.9% 0.072 79.5)
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 #133773, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.020
- Twilight Blue #0A437A ΔE 0.035
- Marine #042E60 ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.049
- Cobalt #1E488F ΔE 0.067
- Dark Blue Grey #1F3B4D ΔE 0.071
- Dark Grey Blue #29465B ΔE 0.073
- Midnight Green #073B4C ΔE 0.074
Use #133773 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.