#133858
Closest named color: Prussian Blue (#1D3557). oklch(33.2% 0.071 248), rgb(19, 56, 88).
Aa
White text reads best on this color (12.10:1).
About this color
#133858 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.071 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.012 away. White text reads best on it, at 12.10:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.73:1 |
| White text | 12.10:1 |
Values
| HEX | #133858 |
| RGB | rgb(19, 56, 88) |
| HSL | hsl(208, 64%, 21%) |
| OKLCH | oklch(33.2% 0.071 248) |
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 #133858 | 12.10:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #133858 | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #133858 text on white | 12.10:1 | AAA | Lc 97.4 | Preferred for body text |
| #133858 text on black | 1.73:1 | 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
#CBDBEC
oklch(88.5% 0.029 249.8)
-
Step 300
300
#A6C4E2
oklch(80.8% 0.054 248.5)
-
Step 400
400
#76A5D3
oklch(70.6% 0.085 248.6)
-
Step 500
500
#508EC8
oklch(63% 0.109 248.5)
-
Step 600
600
#3278B4
oklch(55.7% 0.117 247.7)
-
Step 700
700
#24649B
oklch(49% 0.109 248.3)
-
Step 800
800
#20527E
oklch(42.7% 0.091 248.3)
-
Step 900
900 (this color)
#133858
oklch(33.2% 0.071 248)
-
Step 950
950
#13283B
oklch(26.9% 0.045 247.5)
#133858 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) | #293959 | 0.025 |
| Deuteranopia (no green cones) | #203357 | 0.019 |
| Tritanopia (no blue cones) | #004044 | 0.052 |
| Achromatopsia (no color) | #363636 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133858
#133858
oklch(33.2% 0.071 248)
- #4D2E03
#4D2E03
oklch(33.2% 0.07 68.4)
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 #133858, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.012
- Dark Blue Grey #1F3B4D ΔE 0.027
- Midnight Green #073B4C ΔE 0.028
- Marine Blue #01386A ΔE 0.033
- Marine #042E60 ΔE 0.040
- Gunmetal #293241 ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.054
Use #133858 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.