#10405A
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.3% 0.067 237.3), rgb(16, 64, 90).
Aa
White text reads best on this color (11.03:1).
About this color
#10405A is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.067 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.025 away. White text reads best on it, at 11.03:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.90:1 |
| White text | 11.03:1 |
Values
| HEX | #10405A |
| RGB | rgb(16, 64, 90) |
| HSL | hsl(201, 70%, 21%) |
| OKLCH | oklch(35.3% 0.067 237.3) |
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 #10405A | 11.03:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #10405A | 1.90:1 | Fails | Lc 8.7 | Not readable |
| #10405A text on white | 11.03:1 | AAA | Lc 95.2 | Preferred for body text |
| #10405A text on black | 1.90:1 | Fails | Lc -7.4 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF3
oklch(93.7% 0.015 235.4)
-
Step 200
200
#C9DCEA
oklch(88.5% 0.028 239.7)
-
Step 300
300
#A3C6DE
oklch(80.9% 0.051 238.2)
-
Step 400
400
#6FA8CD
oklch(70.6% 0.081 237.9)
-
Step 500
500
#4492C0
oklch(63.1% 0.103 237.4)
-
Step 600
600
#1D7CAC
oklch(55.6% 0.111 236.8)
-
Step 700
700
#0B6894
oklch(49.1% 0.104 237.3)
-
Step 800
800
#105578
oklch(42.7% 0.086 237.1)
-
Step 900
900 (this color)
#10405A
oklch(35.3% 0.067 237.3)
-
Step 950
950
#102939
oklch(26.9% 0.043 239.2)
#10405A 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) | #34405B | 0.039 |
| Deuteranopia (no green cones) | #2A395A | 0.032 |
| Tritanopia (no blue cones) | #004749 | 0.044 |
| Achromatopsia (no color) | #3C3C3C | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10405A
#10405A
oklch(35.3% 0.067 237.3)
- #553114
#553114
oklch(35.2% 0.067 56.9)
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 #10405A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.025
- Midnight Green #073B4C ΔE 0.029
- Dark Grey Blue #29465B ΔE 0.033
- Charcoal #264653 ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.035
- Marine Blue #01386A ΔE 0.043
- Dark Teal #014D4E ΔE 0.054
- Twilight Blue #0A437A ΔE 0.055
Use #10405A 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.