#10334E
Closest named color: Prussian Blue (#1D3557). oklch(31% 0.063 245.3), rgb(16, 51, 78).
Aa
White text reads best on this color (13.07:1).
About this color
#10334E is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.063 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.022 away. White text reads best on it, at 13.07:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.60:1 |
| White text | 13.07:1 |
Values
| HEX | #10334E |
| RGB | rgb(16, 51, 78) |
| HSL | hsl(206, 66%, 18%) |
| OKLCH | oklch(31% 0.063 245.3) |
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 #10334E | 13.07:1 | AAA | Lc -102.4 | Preferred for body text |
| Black text on #10334E | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #10334E text on white | 13.07:1 | AAA | Lc 99.1 | Preferred for body text |
| #10334E text on black | 1.60:1 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF8
oklch(93.7% 0.021 245.9)
-
Step 200
200
#C3DDF3
oklch(88.5% 0.041 243.7)
-
Step 300
300
#99C6EE
oklch(80.9% 0.074 245.7)
-
Step 400
400
#5BA8E6
oklch(70.8% 0.119 244.9)
-
Step 500
500
#1990DF
oklch(63.2% 0.153 245.3)
-
Step 600
600
#0079BF
oklch(55.7% 0.14 245)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005386
oklch(42.8% 0.108 245.3)
-
Step 900
900
#004570
oklch(37.7% 0.095 244.9)
-
Step 950
950 (this color)
#10334E
oklch(31% 0.063 245.3)
#10334E 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) | #27344F | 0.027 |
| Deuteranopia (no green cones) | #1E2E4D | 0.020 |
| Tritanopia (no blue cones) | #003A3D | 0.046 |
| Achromatopsia (no color) | #313131 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10334E
#10334E
oklch(31% 0.063 245.3)
- #462907
#462907
oklch(31.1% 0.063 65.2)
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 #10334E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.022
- Midnight Green #073B4C ΔE 0.028
- Dark Blue Grey #1F3B4D ΔE 0.033
- Gunmetal #293241 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.039
- Marine #042E60 ΔE 0.040
- Oxford Blue #1B263B ΔE 0.049
- Marine Blue #01386A ΔE 0.049
Use #10334E 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.