#133758
Closest named color: Prussian Blue (#1D3557). oklch(32.9% 0.072 249.3), rgb(19, 55, 88).
Aa
White text reads best on this color (12.24:1).
About this color
#133758 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.072 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.011 away. White text reads best on it, at 12.24:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.71:1 |
| White text | 12.24:1 |
Values
| HEX | #133758 |
| RGB | rgb(19, 55, 88) |
| HSL | hsl(209, 64%, 21%) |
| OKLCH | oklch(32.9% 0.072 249.3) |
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 #133758 | 12.24:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #133758 | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #133758 text on white | 12.24:1 | AAA | Lc 97.7 | Preferred for body text |
| #133758 text on black | 1.71:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CBDBED
oklch(88.5% 0.03 251.3)
-
Step 300
300
#A7C4E3
oklch(80.9% 0.054 250.2)
-
Step 400
400
#76A5D4
oklch(70.6% 0.086 249.1)
-
Step 500
500
#518EC9
oklch(63.1% 0.11 249.2)
-
Step 600
600
#3377B6
oklch(55.6% 0.12 249.4)
-
Step 700
700
#25649C
oklch(49.1% 0.11 248.9)
-
Step 800
800
#21527F
oklch(42.8% 0.092 249.2)
-
Step 900
900 (this color)
#133758
oklch(32.9% 0.072 249.3)
-
Step 950
950
#14283C
oklch(27.1% 0.046 249.9)
#133758 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) | #283959 | 0.025 |
| Deuteranopia (no green cones) | #1E3257 | 0.018 |
| Tritanopia (no blue cones) | #003F43 | 0.054 |
| Achromatopsia (no color) | #353535 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133758
#133758
oklch(32.9% 0.072 249.3)
- #4C2D00
#4C2D00
oklch(32.8% 0.071 69.3)
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 #133758, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.011
- Dark Blue Grey #1F3B4D ΔE 0.029
- Midnight Green #073B4C ΔE 0.029
- Marine Blue #01386A ΔE 0.032
- Marine #042E60 ΔE 0.037
- Gunmetal #293241 ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.057
Use #133758 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.