#21445D
Closest named color: Dark Grey Blue (#29465B). oklch(37.2% 0.059 241.8), rgb(33, 68, 93).
Aa
White text reads best on this color (10.24:1).
About this color
#21445D is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.059 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.012 away. White text reads best on it, at 10.24:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.04:1 |
| White text | 10.24:1 |
Values
| HEX | #21445D |
| RGB | rgb(33, 68, 93) |
| HSL | hsl(205, 48%, 25%) |
| OKLCH | oklch(37.2% 0.059 241.8) |
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 #21445D | 10.24:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #21445D | 2.04:1 | Fails | Lc 10.3 | Not readable |
| #21445D text on white | 10.24:1 | AAA | Lc 93.6 | Preferred for body text |
| #21445D text on black | 2.04:1 | Fails | Lc -8.9 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDCE8
oklch(88.6% 0.024 240.1)
-
Step 300
300
#A8C5DB
oklch(80.9% 0.044 240.9)
-
Step 400
400
#79A7C9
oklch(70.8% 0.07 241)
-
Step 500
500
#5490BC
oklch(63.1% 0.091 242)
-
Step 600
600
#377AA8
oklch(55.7% 0.099 241.6)
-
Step 700
700
#296690
oklch(49% 0.092 242.2)
-
Step 800
800
#235475
oklch(42.8% 0.076 241.2)
-
Step 900
900 (this color)
#21445D
oklch(37.2% 0.059 241.8)
-
Step 950
950
#152937
oklch(27.1% 0.037 240.5)
#21445D 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) | #39445E | 0.030 |
| Deuteranopia (no green cones) | #313E5D | 0.025 |
| Tritanopia (no blue cones) | #004A4D | 0.044 |
| Achromatopsia (no color) | #414141 | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21445D
#21445D
oklch(37.2% 0.059 241.8)
- #57391D
#57391D
oklch(37.3% 0.06 62.3)
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 #21445D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.012
- Charcoal #264653 ΔE 0.021
- Dark Blue Grey #1F3B4D ΔE 0.036
- Midnight Green #073B4C ΔE 0.046
- Prussian Blue #1D3557 ΔE 0.049
- Dark Teal #014D4E ΔE 0.049
- Twilight Blue #0A437A ΔE 0.052
- Dark Slate Gray #2F4F4F ΔE 0.053
Use #21445D 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.