#213173
Closest named color: Marine Blue (#01386A). oklch(34.2% 0.115 269.2), rgb(33, 49, 115).
Aa
White text reads best on this color (11.98:1).
About this color
#213173 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.115 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.035 away. White text reads best on it, at 11.98:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.75:1 |
| White text | 11.98:1 |
Values
| HEX | #213173 |
| RGB | rgb(33, 49, 115) |
| HSL | hsl(228, 55%, 29%) |
| OKLCH | oklch(34.2% 0.115 269.2) |
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 #213173 | 11.98:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #213173 | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #213173 text on white | 11.98:1 | AAA | Lc 97.1 | Preferred for body text |
| #213173 text on black | 1.75:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9FA
oklch(88.6% 0.048 268.4)
-
Step 300
300
#AABFF9
oklch(80.9% 0.086 269)
-
Step 400
400
#7E9BF7
oklch(70.7% 0.139 269.4)
-
Step 500
500
#5F7FF3
oklch(63.1% 0.177 269.2)
-
Step 600
600
#4865E2
oklch(55.6% 0.192 269.3)
-
Step 700
700
#3A53C4
oklch(49.1% 0.178 269.3)
-
Step 800
800
#2F459F
oklch(42.8% 0.148 268.9)
-
Step 900
900 (this color)
#213173
oklch(34.2% 0.115 269.2)
-
Step 950
950
#18234A
oklch(27% 0.074 269.2)
#213173 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) | #003A75 | 0.031 |
| Deuteranopia (no green cones) | #003372 | 0.026 |
| Tritanopia (no blue cones) | #00414D | 0.094 |
| Achromatopsia (no color) | #373737 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213173
#213173
oklch(34.2% 0.115 269.2)
- #473600
#473600
oklch(34.2% 0.07 89.1)
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 #213173, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.035
- Marine #042E60 ΔE 0.045
- Twilight Blue #0A437A ΔE 0.051
- Prussian Blue #1D3557 ΔE 0.053
- Midnight Blue #191970 ΔE 0.061
- Cobalt #1E488F ΔE 0.076
- Dark Blue Grey #1F3B4D ΔE 0.079
- Royal #0C1793 ΔE 0.080
Use #213173 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.