#31455C
Closest named color: Dark Grey Blue (#29465B). oklch(38.4% 0.047 252.5), rgb(49, 69, 92).
Aa
White text reads best on this color (9.82:1).
About this color
#31455C is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.047 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.010 away. White text reads best on it, at 9.82:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.13:1 |
| White text | 9.82:1 |
Values
| HEX | #31455C |
| RGB | rgb(49, 69, 92) |
| HSL | hsl(212, 30%, 28%) |
| OKLCH | oklch(38.4% 0.047 252.5) |
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 #31455C | 9.82:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #31455C | 2.13:1 | Fails | Lc 11.2 | Not readable |
| #31455C text on white | 9.82:1 | AAA | Lc 92.8 | Preferred for body text |
| #31455C text on black | 2.13:1 | Fails | Lc -9.7 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D0DAE6
oklch(88.4% 0.02 252.9)
-
Step 300
300
#B1C3D7
oklch(81% 0.035 251)
-
Step 400
400
#88A3C3
oklch(70.6% 0.056 252.9)
-
Step 500
500
#6A8CB4
oklch(63% 0.072 252.9)
-
Step 600
600
#5176A0
oklch(55.6% 0.078 252.3)
-
Step 700
700
#426389
oklch(49.1% 0.072 252.7)
-
Step 800
800
#36516F
oklch(42.7% 0.06 251.8)
-
Step 900
900 (this color)
#31455C
oklch(38.4% 0.047 252.5)
-
Step 950
950
#1C2735
oklch(26.9% 0.03 254.7)
#31455C 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) | #3C465D | 0.016 |
| Deuteranopia (no green cones) | #37425C | 0.012 |
| Tritanopia (no blue cones) | #214A4D | 0.040 |
| Achromatopsia (no color) | #434343 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31455C
#31455C
oklch(38.4% 0.047 252.5)
- #533F26
#533F26
oklch(38.3% 0.047 71.8)
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 #31455C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.010
- Charcoal #264653 ΔE 0.023
- Charcoal Grey #3C4142 ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.045
- Dark Blue Grey #1F3B4D ΔE 0.047
- Onyx #343A40 ΔE 0.051
- Dark Teal #014D4E ΔE 0.055
- Deep Teal #00555A ΔE 0.060
Use #31455C 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.