#213973
Closest named color: Marine Blue (#01386A). oklch(36% 0.104 264.8), rgb(33, 57, 115).
Aa
White text reads best on this color (11.06:1).
About this color
#213973 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.104 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.030 away. White text reads best on it, at 11.06:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.89:1 |
| White text | 11.06:1 |
Values
| HEX | #213973 |
| RGB | rgb(33, 57, 115) |
| HSL | hsl(222, 55%, 29%) |
| OKLCH | oklch(36% 0.104 264.8) |
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 #213973 | 11.06:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #213973 | 1.89:1 | Fails | Lc 8.6 | Not readable |
| #213973 text on white | 11.06:1 | AAA | Lc 95.3 | Preferred for body text |
| #213973 text on black | 1.89:1 | Fails | Lc -7.3 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CBD9F7
oklch(88.4% 0.044 265.6)
-
Step 300
300
#A8C0F4
oklch(80.8% 0.079 265.4)
-
Step 400
400
#7A9EEF
oklch(70.7% 0.126 265.1)
-
Step 500
500
#5884E9
oklch(63.1% 0.16 264.6)
-
Step 600
600
#3F6BD8
oklch(55.6% 0.174 264.8)
-
Step 700
700
#3158BB
oklch(49% 0.163 264.8)
-
Step 800
800
#294997
oklch(42.7% 0.134 264.6)
-
Step 900
900 (this color)
#213973
oklch(36% 0.104 264.8)
-
Step 950
950
#162546
oklch(27.1% 0.065 264.1)
#213973 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) | #1A4075 | 0.020 |
| Deuteranopia (no green cones) | #063872 | 0.022 |
| Tritanopia (no blue cones) | #004750 | 0.086 |
| Achromatopsia (no color) | #3C3C3C | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213973
#213973
oklch(36% 0.104 264.8)
- #4F3900
#4F3900
oklch(36% 0.074 84.3)
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 #213973, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.030
- Twilight Blue #0A437A ΔE 0.031
- Prussian Blue #1D3557 ΔE 0.050
- Marine #042E60 ΔE 0.055
- Cobalt #1E488F ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.065
- Light Navy #155084 ΔE 0.069
- Dark Blue Grey #1F3B4D ΔE 0.069
Use #213973 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.