#133D63
Closest named color: Marine Blue (#01386A). oklch(35.2% 0.081 249.4), rgb(19, 61, 99).
Aa
White text reads best on this color (11.19:1).
About this color
#133D63 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.081 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.025 away. White text reads best on it, at 11.19:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.87:1 |
| White text | 11.19:1 |
Values
| HEX | #133D63 |
| RGB | rgb(19, 61, 99) |
| HSL | hsl(208, 68%, 23%) |
| OKLCH | oklch(35.2% 0.081 249.4) |
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 #133D63 | 11.19:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #133D63 | 1.87:1 | Fails | Lc 8.3 | Not readable |
| #133D63 text on white | 11.19:1 | AAA | Lc 95.6 | Preferred for body text |
| #133D63 text on black | 1.87:1 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DBEF
oklch(88.4% 0.034 251)
-
Step 300
300
#A3C4E7
oklch(80.8% 0.061 250.1)
-
Step 400
400
#70A5DB
oklch(70.6% 0.098 249.8)
-
Step 500
500
#488ED1
oklch(63.1% 0.124 249.5)
-
Step 600
600
#2677BE
oklch(55.7% 0.134 249.4)
-
Step 700
700
#1763A4
oklch(49% 0.126 249.8)
-
Step 800
800
#175185
oklch(42.6% 0.104 249.9)
-
Step 900
900 (this color)
#133D63
oklch(35.2% 0.081 249.4)
-
Step 950
950
#11283E
oklch(27% 0.05 249.3)
#133D63 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) | #2B3F65 | 0.027 |
| Deuteranopia (no green cones) | #203862 | 0.018 |
| Tritanopia (no blue cones) | #00464B | 0.059 |
| Achromatopsia (no color) | #3B3B3B | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133D63
#133D63
oklch(35.2% 0.081 249.4)
- #543200
#543200
oklch(35.1% 0.077 69)
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 #133D63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.025
- Prussian Blue #1D3557 ΔE 0.029
- Dark Blue Grey #1F3B4D ΔE 0.038
- Twilight Blue #0A437A ΔE 0.041
- Midnight Green #073B4C ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.043
- Charcoal #264653 ΔE 0.050
- Marine #042E60 ΔE 0.050
Use #133D63 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.