#21334D
Closest named color: Prussian Blue (#1D3557). oklch(31.9% 0.052 257.5), rgb(33, 51, 77).
Aa
White text reads best on this color (12.76:1).
About this color
#21334D is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.052 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.018 away. White text reads best on it, at 12.76:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.64:1 |
| White text | 12.76:1 |
Values
| HEX | #21334D |
| RGB | rgb(33, 51, 77) |
| HSL | hsl(215, 40%, 22%) |
| OKLCH | oklch(31.9% 0.052 257.5) |
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 #21334D | 12.76:1 | AAA | Lc -102.1 | Preferred for body text |
| Black text on #21334D | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #21334D text on white | 12.76:1 | AAA | Lc 98.8 | Preferred for body text |
| #21334D text on black | 1.64:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF6
oklch(93.7% 0.017 256.3)
-
Step 200
200
#CBDAF0
oklch(88.4% 0.034 257.9)
-
Step 300
300
#A8C3E9
oklch(81% 0.061 256.9)
-
Step 400
400
#79A2DE
oklch(70.6% 0.099 257.8)
-
Step 500
500
#568AD5
oklch(63.1% 0.127 257.6)
-
Step 600
600
#3A73C2
oklch(55.7% 0.137 257.1)
-
Step 700
700
#2C60A8
oklch(49.2% 0.128 257.2)
-
Step 800
800
#264E88
oklch(42.6% 0.107 257.9)
-
Step 900
900
#23426D
oklch(37.8% 0.083 257)
-
Step 950
950 (this color)
#21334D
oklch(31.9% 0.052 257.5)
#21334D 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) | #29354E | 0.014 |
| Deuteranopia (no green cones) | #23304C | 0.010 |
| Tritanopia (no blue cones) | #0B393C | 0.047 |
| Achromatopsia (no color) | #323232 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21334D
#21334D
oklch(31.9% 0.052 257.5)
- #412F10
#412F10
oklch(31.9% 0.052 78.4)
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 #21334D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.018
- Gunmetal #293241 ΔE 0.023
- Space Cadet #2B2D42 ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.027
- Midnight Green #073B4C ΔE 0.033
- Onyx #343A40 ΔE 0.047
- Marine #042E60 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.051
Use #21334D 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.