#133766
Closest named color: Marine Blue (#01386A). oklch(33.9% 0.092 256.5), rgb(19, 55, 102).
Aa
White text reads best on this color (11.89:1).
About this color
#133766 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.092 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.012 away. White text reads best on it, at 11.89:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.76:1 |
| White text | 11.89:1 |
Values
| HEX | #133766 |
| RGB | rgb(19, 55, 102) |
| HSL | hsl(214, 69%, 24%) |
| OKLCH | oklch(33.9% 0.092 256.5) |
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 #133766 | 11.89:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #133766 | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #133766 text on white | 11.89:1 | AAA | Lc 96.9 | Preferred for body text |
| #133766 text on black | 1.76:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C9DBF3
oklch(88.5% 0.038 255.6)
-
Step 300
300
#A4C3ED
oklch(80.9% 0.069 256.1)
-
Step 400
400
#72A3E5
oklch(70.8% 0.111 256.1)
-
Step 500
500
#4C8ADD
oklch(63.1% 0.141 256.4)
-
Step 600
600
#2E72CB
oklch(55.6% 0.154 256.6)
-
Step 700
700
#205FB0
oklch(49.1% 0.144 256.6)
-
Step 800
800
#1D4E8E
oklch(42.7% 0.118 256.6)
-
Step 900
900 (this color)
#133766
oklch(33.9% 0.092 256.5)
-
Step 950
950
#122742
oklch(27.1% 0.057 255.5)
#133766 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) | #1F3B68 | 0.018 |
| Deuteranopia (no green cones) | #103465 | 0.010 |
| Tritanopia (no blue cones) | #004249 | 0.071 |
| Achromatopsia (no color) | #373737 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133766
#133766
oklch(33.9% 0.092 256.5)
- #4C3200
#4C3200
oklch(33.9% 0.071 77.1)
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 #133766, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.012
- Prussian Blue #1D3557 ΔE 0.027
- Marine #042E60 ΔE 0.033
- Twilight Blue #0A437A ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.050
- Midnight Green #073B4C ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.062
- Gunmetal #293241 ΔE 0.067
Use #133766 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.