#21569B
Closest named color: Dusk Blue (#26538D). oklch(45.6% 0.126 256.5), rgb(33, 86, 155).
Aa
White text reads best on this color (7.31:1).
About this color
#21569B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.126 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.023 away. White text reads best on it, at 7.31:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.86:1 |
| White text | 7.31:1 |
Values
| HEX | #21569B |
| RGB | rgb(33, 86, 155) |
| HSL | hsl(214, 65%, 37%) |
| OKLCH | oklch(45.6% 0.126 256.5) |
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 #21569B | 7.31:1 | AAA | Lc -89.9 | Fine for body text |
| Black text on #21569B | 2.86:1 | Fails | Lc 19.0 | Dividers and decoration only |
| #21569B text on white | 7.31:1 | AAA | Lc 85.0 | Fine for body text |
| #21569B text on black | 2.86:1 | Fails | Lc -17.0 | Dividers and decoration only |
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 800.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A2C3F0
oklch(80.9% 0.073 256.2)
-
Step 400
400
#6FA3E9
oklch(70.8% 0.117 256.1)
-
Step 500
500
#478AE2
oklch(63.2% 0.15 256.1)
-
Step 600
600
#2771D0
oklch(55.5% 0.163 256.6)
-
Step 700
700
#195EB4
oklch(49% 0.152 256.6)
-
Step 800
800 (this color)
#21569B
oklch(45.6% 0.126 256.5)
-
Step 900
900
#1B4174
oklch(37.7% 0.098 256.7)
-
Step 950
950
#112744
oklch(27.1% 0.061 256.1)
#21569B 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) | #335C9E | 0.026 |
| Deuteranopia (no green cones) | #1B519A | 0.016 |
| Tritanopia (no blue cones) | #006671 | 0.095 |
| Achromatopsia (no color) | #565656 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21569B
#21569B
oklch(45.6% 0.126 256.5)
- #754E00
#754E00
oklch(45.6% 0.096 75.8)
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 #21569B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.023
- Denim Blue #3B5B92 ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.037
- Light Navy #155084 ΔE 0.042
- Cobalt #1E488F ΔE 0.043
- Deep Sea Blue #015482 ΔE 0.046
- Dusky Blue #475F94 ΔE 0.052
- Peacock Blue #016795 ΔE 0.052
Use #21569B 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.