#213F68
Closest named color: Twilight Blue (#0A437A). oklch(36.6% 0.08 256.7), rgb(33, 63, 104).
Aa
White text reads best on this color (10.62:1).
About this color
#213F68 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.080 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.033 away. White text reads best on it, at 10.62:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.97:1 |
| White text | 10.62:1 |
Values
| HEX | #213F68 |
| RGB | rgb(33, 63, 104) |
| HSL | hsl(215, 52%, 27%) |
| OKLCH | oklch(36.6% 0.08 256.7) |
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 #213F68 | 10.62:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #213F68 | 1.97:1 | Fails | Lc 9.5 | Not readable |
| #213F68 text on white | 10.62:1 | AAA | Lc 94.5 | Preferred for body text |
| #213F68 text on black | 1.97:1 | Fails | Lc -8.1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF6
oklch(93.7% 0.017 256.3)
-
Step 200
200
#CBDAEF
oklch(88.4% 0.033 256.8)
-
Step 300
300
#A8C3E8
oklch(81% 0.06 256.3)
-
Step 400
400
#79A3DC
oklch(70.7% 0.096 256.2)
-
Step 500
500
#578BD2
oklch(63.2% 0.121 256.5)
-
Step 600
600
#3B73BF
oklch(55.5% 0.133 256.7)
-
Step 700
700
#2D60A5
oklch(49% 0.124 256.8)
-
Step 800
800
#264F86
oklch(42.7% 0.103 256.5)
-
Step 900
900 (this color)
#213F68
oklch(36.6% 0.08 256.7)
-
Step 950
950
#15273F
oklch(27% 0.051 256.1)
#213F68 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) | #2D426A | 0.018 |
| Deuteranopia (no green cones) | #233B67 | 0.012 |
| Tritanopia (no blue cones) | #00484E | 0.065 |
| Achromatopsia (no color) | #3E3E3E | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213F68
#213F68
oklch(36.6% 0.08 256.7)
- #553800
#553800
oklch(36.5% 0.077 76.5)
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 #213F68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.033
- Marine Blue #01386A ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.037
- Prussian Blue #1D3557 ΔE 0.040
- Dark Blue Grey #1F3B4D ΔE 0.047
- Charcoal #264653 ΔE 0.048
- Midnight Green #073B4C ΔE 0.056
- Marine #042E60 ΔE 0.062
Use #213F68 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.