#133779
Closest named color: Marine Blue (#01386A). oklch(35.4% 0.12 261.3), rgb(19, 55, 121).
Aa
White text reads best on this color (11.34:1).
About this color
#133779 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.120 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.029 away. White text reads best on it, at 11.34:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.85:1 |
| White text | 11.34:1 |
Values
| HEX | #133779 |
| RGB | rgb(19, 55, 121) |
| HSL | hsl(219, 73%, 27%) |
| OKLCH | oklch(35.4% 0.12 261.3) |
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 #133779 | 11.34:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #133779 | 1.85:1 | Fails | Lc 8.2 | Not readable |
| #133779 text on white | 11.34:1 | AAA | Lc 95.7 | Preferred for body text |
| #133779 text on black | 1.85:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFC
oklch(93.5% 0.027 262.3)
-
Step 200
200
#C7DAFB
oklch(88.5% 0.05 261.5)
-
Step 300
300
#A0C1FB
oklch(80.8% 0.09 261.5)
-
Step 400
400
#6C9FFA
oklch(70.7% 0.145 261.3)
-
Step 500
500
#4584F7
oklch(63.1% 0.184 261.2)
-
Step 600
600
#266AE6
oklch(55.6% 0.2 261.2)
-
Step 700
700
#1957C8
oklch(49% 0.187 261.3)
-
Step 800
800
#1748A2
oklch(42.7% 0.155 261.3)
-
Step 900
900 (this color)
#133779
oklch(35.4% 0.12 261.3)
-
Step 950
950
#10254B
oklch(27.1% 0.076 261.2)
#133779 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) | #073F7B | 0.022 |
| Deuteranopia (no green cones) | #003678 | 0.012 |
| Tritanopia (no blue cones) | #004752 | 0.093 |
| Achromatopsia (no color) | #3A3A3A | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133779
#133779
oklch(35.4% 0.12 261.3)
- #4F3700
#4F3700
oklch(35.5% 0.073 81.3)
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 #133779, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.029
- Twilight Blue #0A437A ΔE 0.034
- Marine #042E60 ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.059
- Cobalt #1E488F ΔE 0.061
- Light Navy #155084 ΔE 0.074
- Midnight Blue #191970 ΔE 0.074
- Royal #0C1793 ΔE 0.080
Use #133779 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.