#1D5FB2
Closest named color: Mid Blue (#276AB3). oklch(49.2% 0.147 256.5), rgb(29, 95, 178).
Aa
White text reads best on this color (6.30:1).
About this color
#1D5FB2 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.147 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.033 away. White text reads best on it, at 6.30:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.33:1 |
| White text | 6.30:1 |
Values
| HEX | #1D5FB2 |
| RGB | rgb(29, 95, 178) |
| HSL | hsl(213, 72%, 41%) |
| OKLCH | oklch(49.2% 0.147 256.5) |
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 #1D5FB2 | 6.30:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #1D5FB2 | 3.33:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #1D5FB2 text on white | 6.30:1 | AA | Lc 80.9 | Fine for body text |
| #1D5FB2 text on black | 3.33:1 | AA large text | Lc -21.0 | Dividers and decoration only |
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 700.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C9DBF4
oklch(88.6% 0.04 256.6)
-
Step 300
300
#A3C3EF
oklch(80.9% 0.072 256.4)
-
Step 400
400
#71A3E7
oklch(70.8% 0.114 256.3)
-
Step 500
500
#4A8AE0
oklch(63.2% 0.146 256.5)
-
Step 600
600
#2A72CD
oklch(55.6% 0.158 256.2)
-
Step 700
700 (this color)
#1D5FB2
oklch(49.2% 0.147 256.5)
-
Step 800
800
#1A4E90
oklch(42.7% 0.122 256.3)
-
Step 900
900
#1C4173
oklch(37.6% 0.096 256.8)
-
Step 950
950
#112743
oklch(27.1% 0.059 255.4)
#1D5FB2 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) | #3167B5 | 0.029 |
| Deuteranopia (no green cones) | #055AB0 | 0.019 |
| Tritanopia (no blue cones) | #007380 | 0.111 |
| Achromatopsia (no color) | #606060 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D5FB2
#1D5FB2
oklch(49.2% 0.147 256.5)
- #815700
#815700
oklch(49% 0.103 76.4)
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 #1D5FB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.033
- French Blue #436BAD ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.054
- Peacock Blue #016795 ΔE 0.057
- Dusky Blue #475F94 ΔE 0.059
- Dusk Blue #26538D ΔE 0.064
- Light Navy Blue #2E5A88 ΔE 0.067
- Denim #3B638C ΔE 0.068
Use #1D5FB2 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.