#1F435C
Closest named color: Dark Grey Blue (#29465B). oklch(36.8% 0.06 241.3), rgb(31, 67, 92).
Aa
White text reads best on this color (10.41:1).
About this color
#1F435C is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.060 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.016 away. White text reads best on it, at 10.41:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.01:1 |
| White text | 10.41:1 |
Values
| HEX | #1F435C |
| RGB | rgb(31, 67, 92) |
| HSL | hsl(205, 50%, 24%) |
| OKLCH | oklch(36.8% 0.06 241.3) |
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 #1F435C | 10.41:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #1F435C | 2.01:1 | Fails | Lc 9.9 | Not readable |
| #1F435C text on white | 10.41:1 | AAA | Lc 94.0 | Preferred for body text |
| #1F435C text on black | 2.01:1 | Fails | Lc -8.5 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CBDCE8
oklch(88.5% 0.025 238.4)
-
Step 300
300
#A8C5DB
oklch(80.9% 0.044 240.9)
-
Step 400
400
#78A7CA
oklch(70.8% 0.072 241.2)
-
Step 500
500
#5390BC
oklch(63% 0.092 241.6)
-
Step 600
600
#357AA8
oklch(55.6% 0.099 241)
-
Step 700
700
#276690
oklch(49% 0.093 241.6)
-
Step 800
800
#225475
oklch(42.8% 0.077 240.8)
-
Step 900
900 (this color)
#1F435C
oklch(36.8% 0.06 241.3)
-
Step 950
950
#142937
oklch(27% 0.038 239.4)
#1F435C 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) | #38435D | 0.031 |
| Deuteranopia (no green cones) | #2F3D5C | 0.025 |
| Tritanopia (no blue cones) | #00494C | 0.044 |
| Achromatopsia (no color) | #404040 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F435C
#1F435C
oklch(36.8% 0.06 241.3)
- #56371C
#56371C
oklch(36.7% 0.06 60.3)
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 #1F435C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.016
- Charcoal #264653 ΔE 0.022
- Dark Blue Grey #1F3B4D ΔE 0.033
- Midnight Green #073B4C ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.045
- Dark Teal #014D4E ΔE 0.049
- Onyx #343A40 ΔE 0.052
- Twilight Blue #0A437A ΔE 0.053
Use #1F435C 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.