#10405B
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.4% 0.068 238.3), rgb(16, 64, 91).
Aa
White text reads best on this color (11.01:1).
About this color
#10405B is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.068 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.027 away. White text reads best on it, at 11.01:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.90:1 |
| White text | 11.01:1 |
Values
| HEX | #10405B |
| RGB | rgb(16, 64, 91) |
| HSL | hsl(202, 70%, 21%) |
| OKLCH | oklch(35.4% 0.068 238.3) |
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 #10405B | 11.01:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #10405B | 1.90:1 | Fails | Lc 8.7 | Not readable |
| #10405B text on white | 11.01:1 | AAA | Lc 95.2 | Preferred for body text |
| #10405B 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
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
#6EA8CE
oklch(70.6% 0.082 238.2)
-
Step 500
500
#4492C1
oklch(63.1% 0.104 238)
-
Step 600
600
#1C7BAE
oklch(55.5% 0.115 238.6)
-
Step 700
700
#0A6895
oklch(49.1% 0.105 237.8)
-
Step 800
800
#105579
oklch(42.7% 0.087 237.9)
-
Step 900
900 (this color)
#10405B
oklch(35.4% 0.068 238.3)
-
Step 950
950
#0F2939
oklch(26.9% 0.044 238.4)
#10405B 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) | #33405C | 0.037 |
| Deuteranopia (no green cones) | #29395B | 0.031 |
| Tritanopia (no blue cones) | #004749 | 0.046 |
| Achromatopsia (no color) | #3C3C3C | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #10405B
#10405B
oklch(35.4% 0.068 238.3)
- #563212
#563212
oklch(35.5% 0.069 59.1)
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 #10405B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.027
- Midnight Green #073B4C ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.033
- Charcoal #264653 ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.035
- Marine Blue #01386A ΔE 0.042
- Twilight Blue #0A437A ΔE 0.053
- Dark Teal #014D4E ΔE 0.055
Use #10405B 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.