#133257
Closest named color: Prussian Blue (#1D3557). oklch(31.5% 0.076 254.6), rgb(19, 50, 87).
Aa
White text reads best on this color (12.95:1).
About this color
#133257 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.076 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.015 away. White text reads best on it, at 12.95:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.62:1 |
| White text | 12.95:1 |
Values
| HEX | #133257 |
| RGB | rgb(19, 50, 87) |
| HSL | hsl(213, 64%, 21%) |
| OKLCH | oklch(31.5% 0.076 254.6) |
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 #133257 | 12.95:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #133257 | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #133257 text on white | 12.95:1 | AAA | Lc 98.9 | Preferred for body text |
| #133257 text on black | 1.62:1 | 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 950.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFB
oklch(93.5% 0.026 253.6)
-
Step 200
200
#C3DCFA
oklch(88.6% 0.049 253.1)
-
Step 300
300
#99C4FA
oklch(80.9% 0.09 254.4)
-
Step 400
400
#5EA3F8
oklch(70.8% 0.144 254.6)
-
Step 500
500
#2689F5
oklch(63.2% 0.184 254.5)
-
Step 600
600
#0071D9
oklch(55.6% 0.181 254.6)
-
Step 700
700
#005FB8
oklch(49.1% 0.16 254.6)
-
Step 800
800
#004D98
oklch(42.6% 0.139 254.8)
-
Step 900
900
#03407F
oklch(37.6% 0.121 254.9)
-
Step 950
950 (this color)
#133257
oklch(31.5% 0.076 254.6)
#133257 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) | #213558 | 0.019 |
| Deuteranopia (no green cones) | #162E56 | 0.012 |
| Tritanopia (no blue cones) | #003B40 | 0.059 |
| Achromatopsia (no color) | #313131 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133257
#133257
oklch(31.5% 0.076 254.6)
- #452C00
#452C00
oklch(31.6% 0.067 75.3)
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 #133257, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.015
- Marine #042E60 ΔE 0.025
- Marine Blue #01386A ΔE 0.036
- Midnight Green #073B4C ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.046
- Gunmetal #293241 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.057
Use #133257 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.