#133575
Closest named color: Marine Blue (#01386A). oklch(34.6% 0.117 261.5), rgb(19, 53, 117).
Aa
White text reads best on this color (11.70:1).
About this color
#133575 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.117 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.024 away. White text reads best on it, at 11.70:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.79:1 |
| White text | 11.70:1 |
Values
| HEX | #133575 |
| RGB | rgb(19, 53, 117) |
| HSL | hsl(219, 72%, 27%) |
| OKLCH | oklch(34.6% 0.117 261.5) |
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 #133575 | 11.70:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #133575 | 1.79:1 | Fails | Lc 7.4 | Not readable |
| #133575 text on white | 11.70:1 | AAA | Lc 96.4 | Preferred for body text |
| #133575 text on black | 1.79:1 | 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
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAFA
oklch(88.5% 0.048 262)
-
Step 300
300
#A1C1FA
oklch(80.8% 0.088 261.8)
-
Step 400
400
#6E9FF8
oklch(70.7% 0.141 261.6)
-
Step 500
500
#4884F4
oklch(63.1% 0.179 261.6)
-
Step 600
600
#2A6AE3
oklch(55.5% 0.196 261.6)
-
Step 700
700
#1E58C5
oklch(49.1% 0.181 261.5)
-
Step 800
800
#1A49A0
oklch(42.8% 0.15 261.4)
-
Step 900
900 (this color)
#133575
oklch(34.6% 0.117 261.5)
-
Step 950
950
#11254A
oklch(27.1% 0.074 261.5)
#133575 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) | #073D77 | 0.023 |
| Deuteranopia (no green cones) | #003474 | 0.013 |
| Tritanopia (no blue cones) | #00454F | 0.092 |
| Achromatopsia (no color) | #383838 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133575
#133575
oklch(34.6% 0.117 261.5)
- #4C3500
#4C3500
oklch(34.6% 0.071 81.7)
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 #133575, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.024
- Twilight Blue #0A437A ΔE 0.040
- Marine #042E60 ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.053
- Midnight Blue #191970 ΔE 0.068
- Cobalt #1E488F ΔE 0.069
- Dark Blue Grey #1F3B4D ΔE 0.077
- Midnight Green #073B4C ΔE 0.079
Use #133575 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.