#10334C
Closest named color: Prussian Blue (#1D3557). oklch(30.9% 0.06 243.3), rgb(16, 51, 76).
Aa
White text reads best on this color (13.12:1).
About this color
#10334C is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.060 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.025 away. White text reads best on it, at 13.12:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.59:1 |
| White text | 13.12:1 |
Values
| HEX | #10334C |
| RGB | rgb(16, 51, 76) |
| HSL | hsl(205, 65%, 18%) |
| OKLCH | oklch(30.9% 0.06 243.3) |
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 #10334C | 13.12:1 | AAA | Lc -102.5 | Preferred for body text |
| Black text on #10334C | 1.59:1 | Fails | Lc 0.0 | Not readable |
| #10334C text on white | 13.12:1 | AAA | Lc 99.2 | Preferred for body text |
| #10334C text on black | 1.59:1 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C4DDF2
oklch(88.6% 0.039 243.5)
-
Step 300
300
#99C7EC
oklch(81% 0.072 243)
-
Step 400
400
#5CA8E2
oklch(70.7% 0.114 243.5)
-
Step 500
500
#1B91DA
oklch(63.1% 0.146 243.3)
-
Step 600
600
#007ABC
oklch(55.7% 0.136 243.3)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005483
oklch(42.8% 0.104 243)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950 (this color)
#10334C
oklch(30.9% 0.06 243.3)
#10334C 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) | #28344D | 0.029 |
| Deuteranopia (no green cones) | #1F2E4C | 0.021 |
| Tritanopia (no blue cones) | #00393C | 0.042 |
| Achromatopsia (no color) | #303030 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10334C
#10334C
oklch(30.9% 0.06 243.3)
- #45290A
#45290A
oklch(31% 0.06 64.4)
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 #10334C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.025
- Midnight Green #073B4C ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.033
- Gunmetal #293241 ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.037
- Marine #042E60 ΔE 0.043
- Oxford Blue #1B263B ΔE 0.047
- Marine Blue #01386A ΔE 0.053
Use #10334C 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.