#17304D
Closest named color: Prussian Blue (#1D3557). oklch(30.5% 0.061 253.5), rgb(23, 48, 77).
Aa
White text reads best on this color (13.40:1).
About this color
#17304D is a dark, muted blue. In OKLCH its lightness is 30%, its chroma 0.061 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.024 away. White text reads best on it, at 13.40:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.56:1 |
| White text | 13.40:1 |
Values
| HEX | #17304D |
| RGB | rgb(23, 48, 77) |
| HSL | hsl(212, 54%, 20%) |
| OKLCH | oklch(30.5% 0.061 253.5) |
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 #17304D | 13.40:1 | AAA | Lc -102.9 | Preferred for body text |
| Black text on #17304D | 1.56:1 | Fails | Lc 0.0 | Not readable |
| #17304D text on white | 13.40:1 | AAA | Lc 99.7 | Preferred for body text |
| #17304D text on black | 1.56:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C7DBF4
oklch(88.4% 0.041 254)
-
Step 300
300
#A0C4EF
oklch(80.9% 0.072 253.1)
-
Step 400
400
#6BA4E7
oklch(70.7% 0.116 253.3)
-
Step 500
500
#408BE0
oklch(63% 0.148 253.6)
-
Step 600
600
#1973CE
oklch(55.5% 0.162 253.6)
-
Step 700
700
#0760B2
oklch(49% 0.15 253.5)
-
Step 800
800
#0E4F90
oklch(42.7% 0.124 253.4)
-
Step 900
900
#154273
oklch(37.6% 0.097 253.4)
-
Step 950
950 (this color)
#17304D
oklch(30.5% 0.061 253.5)
#17304D 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) | #23324E | 0.017 |
| Deuteranopia (no green cones) | #1C2D4C | 0.010 |
| Tritanopia (no blue cones) | #00373B | 0.049 |
| Achromatopsia (no color) | #2F2F2F | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17304D
#17304D
oklch(30.5% 0.061 253.5)
- #412904
#412904
oklch(30.3% 0.061 72.7)
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 #17304D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.024
- Space Cadet #2B2D42 ΔE 0.032
- Gunmetal #293241 ΔE 0.034
- Midnight Green #073B4C ΔE 0.038
- Marine #042E60 ΔE 0.038
- Dark Blue Grey #1F3B4D ΔE 0.040
- Oxford Blue #1B263B ΔE 0.041
- Marine Blue #01386A ΔE 0.053
Use #17304D 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.